Incapacitate him

1. Dig a hole, put murderer in the hole, pour concrete


2. Dig a hole, put murderer in the hole, pour molten iron


3. Cast murderer in steel, dump it in the ocean


4. Launch it with the next satellite for deep space.


5. ...

Honestly, the possibilities are infinite. Strong as an elephant is meaningless if he can't move. If he doesn't use a vehicle, you can circle around him all day (less refuelling) and ponder how to stop him.

Assuming he can be contained, launch him into Jupiter. Not the sun: the sun has flares and coronal mass ejections that might fling him back out. Dump him into Jupiter. He'd stop sinking in the supercritical hydrogen layer a few thousand kilometers down and be stuck there for at least a few billion years until the sun entered the white dwarf stage and Jupiter started cooling, but it could be another few billion years after that before it cooled enough to give him a frozen surface he could actually walk on.

If anyone started strip-mining Jupiter for the mass before then, one would assume they'd have sufficient technology to deal with him another way like firing him into a black hole.

Imprison him in an indoor skydiving facility.

Superpowered earthbound killers are sort of frustrating to me. Doomsday, for example. Is there no-one in the DC world who can levitate people telekinetically? Can Superman not just puff him up into the air with superbreath, then puff again, and puff and puff while Batman figures out a longer term solution?

Once these Hulkish bruisers are off the ground, they have no leverage. They can flail about with good comic effect. Shouting is fine. They might be able to spit hard or throw stuff like a caged monkey. But that is about it.

So your psycho gets put in an indoor skydiving facility and there he stays, hovering. Sell tickets for people who want to watch the flailing. If you need him for your plot you can have someone come break him out.

Make him depressed, he wont get out of bed.

I looked up the SCP you mentioned, and I don't see how you could possibly stop him. It explicitly says he can't be stopped.

So I'm gonna ignore that part, and go with the Jason example. Lure him into a pit or room somewhere, and pour concrete on him. Once it cures, dispose of him however you like. Launch him into a graveyard orbit, drop him into Jupiter or the sun, or bury him in a subduction zone so he'll sink into the mantle.

Teach him math

Poor invulnerable psychotic misanthropic man... He's taken on an impossible task. There are 7.5 billion people. To kill us all in a year would require slaughtering more than 20,000,000 people a day. This seems implausible.

Killing 500 people a day, it would take him around 40,000 years to manage 7.5 billion - but over that long a period, that would scarcely dent population growth!

One invincible psychotic murderer simply cannot get the job done. The mathematics don't pan out.

Now, if he just takes it easy and waits however many centuries or millennia it takes for us to go nearly extinct... As long as we don't become an interstellar species, he just needs patience - and a good grasp of math.

Subvert his personality co-opt him - turn him into a superhero.

Anger management.

After catching him with a net, drop him in a teflon coated slippery bowl, surround the bowl with a fence and see-through plastic shield (only needs to be strong enough to stop people falling in), then invite the public to come gawp at him and mock him.

No doubt he will rage and rage, quite impotentley of course, he will be mocked about this.

This would count as exposure tharapy in the first stage of:

Cognitive behavioural therapy.

First an assesment would have produced clear triggers for the murderous rage: humans. Thus the exposure above.

He would then be given councelling, if necessary by remote (no image of a human need be seen at first) to encourage him to develope strategies of coping with his anger.

A variety of therapies may be given: CPT, Stress innoculation (psychological resillience therapy, Relaxation Training, ACT.

Ultimatley he will learn to accept his urges and private feelings without the necessity of acting upon them, understand better the context of his life and be free to chose to act for the benefit of all.

Either that or he can have raw custard (dilatant non-newtonian fluid) poured on him to a depth that he finds disagreeable and just let him live there in the bowl. There is a video, fast forward to 7.30 to start to see the point of the effect (beware - terrible jokes allert) 14 minutes in the guy starts to panic.

Virtual Reality imprisonment

Build a machine that constrains his motion, and turns it into power. Imprison him in a virtual reality machine, giving him the satisfaction of chasing and killing an infinite number of humans, meanwhile all of his efforts produce enough power to keep a small city lit up.

Build a pit in a granite formation, say 10x10 hole, 20 feet deep. Disguise the opening. Place bait (ie distressed damsel) on opposite side of pit.

Mindless rage monster runs at the damsel and falls in pit.

Drop a 9.5 x 9.5 x 9.5 stone cube on top of rage monster. Fill remainder of hole with cement or lime slurry.

This answer is based on the information given in your question.¹

Aside from being immortal and invulnerable, the only advantage of this superhuman is their strength. Thus by negating the strength advantage you effectively have them neutralized.

How do we negate the strength advantage?

I am glad you asked, simply put them under pressure. Find a means to apply a constant pressure upon them, greater than the force they can apply and you are done. You could e.g. make use of hydraulics to build up a pressure differential they are put in-between.

_{¹I did not look up any of the mentioned pop-culture phenomena as they are neither linked nor inlined and thus not actively relevant}

I don't see why restraining him would take anything more than a typical prison inmate? Maybe a somewhat reinforced cell? Invulnerable and immortal makes no difference, since you don't want to hurt or kill your inmates. The only important super ability he has is that he's a bit strong. So long as your cell would withstand a smart inmate with a crowbar and a winch, then you're good.

But first, you have to capture and restrain him. Assuming he's "invulnerable" to everything, so tasers and gasses won't work, some kind of entrapment would work - a pit trap, for example.

The encasement that others have suggested (mortar, lava, etc) should be safe since he can't accidentally be harmed. By the same measure, you could just enclose him ny driving at him with a truck.

Or what about just playing golf with him and a bunch of RPGs? Consider, you have a pit trap in a golf course. You've lured him to the golf course. Your goal is to knock him into the pit trap by shooting him with high explosives.

There's one guy with essentially zero anti-capture super powers other than "push/punch door", and he can't push a door with 9 tonnes of force since unless he has something to brace against. Exactly how far does he expect to get?

So let's flip the question around. So, we're That Guy. We can't be hurt or killed, and we're pretty strong, but we can be captured, and we're susceptible to losing our mind around people. We need to kill as many people as possible, preferably All The People.

Bombs... just won't kill enough. Going out into crowds, we won't be able to kill nearly as many and will risk capture.

And we need to kill them FAST. A few years, tops. The more time we take, the more likely they are to capture us.

So, what other options are there?

• We can leap onto air liners and plough them into buildings and walk away and grab more air liners and rinse and repeat, but after the first few all planes will be grounded and we'll just be shot down on takeoff. We'd kill hundreds, maybe thousands if we're lucky. We need to be thinking at least in the hundreds of thousands.


• Ocean liners. We could probably sink and destroy a few without being discovered before people stopped using them. But say we hit the top ten biggest ones in one fell sweep, in the first day. About five thousand per ship, assuming they're full. That's fifty thousand people, which is a decent number. Now we just need to equal or top that kill rate every hour for the next twenty years or so... OK, this isn't going to work.


• What if we destroy all nuclear plants? Most are built to survive a direct impact from an airplane, but possibly not a fully loaded Airbus A380. The reason to do this is to just make much of the planet unlivable, reducing our target area. Except... we'd need to destroy an insane number of them before we'd make any significant dent in the livable surface area, and I'm unsure there even are that many (anyone want to do the math?) Plus, after the first few, the rest would be temporarily decommissioned or protected against the plane attack method, so we'd need other approaches.


• OK, so it's all-out thermonuclear war, or nothing. But how do we start thermonuclear war? All the systems are guarded. Even if we broke into a nuclear depot, how would we fire the missiles? How do we figure out all the interlocks and safety protocols and authentication requirements? The only real way is to get into the design team.


• OK, bioweapons, then. The only real way there, again, is to get into a bioweapons research team.

There is one final option, but it would take some luck.

Invest in pot, lots of pot, enough to keep you mellow even in large crowds. Always be stoned, your cover depends on not going Hulk. Invest in an internet startup. Become rich enough to start up some companies (this is the luck part). Start up a successful space research company (takes more luck, or at least a fanatical level of determination to see it through). Create some truly massive rockets. Begin many other companies with philanthropic goals to get a following with religious, unquestioning fervor. Get the company to the point where it is regularly sending interplanetary ships. Get some of your followers to agree to a mission where they attach rockets to space rocks for space mining in orbit around your lunar facility. Attach the rockets to something which is about 60 miles (100km) in diameter.

Do the maneuver perfectly, exactly as you had told your investors, bringing it safely into orbit around the moon... except, once it is hidden from all those pesky earth-based observers by the moon, have the rockets change the path to an orbital slingshot which ploughs the rock into the Earth, wiping out all life other than the few employees you have left in space, who will be easy to mop up.

How would you stop or restrain such a man? Basically the same way as any other man, as I said above. But first, you need to know that you needed to stop him.

1. Bolt and chain,


2. Wall, and/or


3. Maximum security prison setup.

Cemented ground (so a dirt ramp cannot be constructed, sturdy wall, added chain if you're able to get near him. Reinforce these regularly. Determine his range and start with your reinforced fence / wall outside the amount of time it will take to construct; then continually reinforce it indefinitely.

Your magma bath is ready

I'm sorry, has it gotten cold?

Using bait (death row inmate / cardboard cut out of Bob Ross) lure the man/creature into a location where you can pour liquid metal or magma (substance that is currently liquid but will harden at room temperature) on them. Making sure that the substance once harden is harder than what the man/creature can break.

After the first pour as long as the creature is partly covered you can repeat the process over and over again.
Each time you would be able to cover more of the creature. At one point the creature will be gone, trapped inside the metal casing.

Now don't stop. Keep pouring layer after layer. Every year or so engineers/scientists compete to see who has the strongest/hardest material. The winner will have their material chosen as the next layer.

When the technology bubble pops and humanity is thrown back into the dark ages. Hopefully there is enough layers wrapped around this creature to keep them trapped until technology catches up again.

There are multiple people suggesting that they fling him into a planet or a star or what ever... of course, how do you stop the unstoppable? More importantly, if this is your option, why stop the unstoppable? Just fling him into space on a trajectory away from Earth. Since space is a vacuum, he'll never stop, just like he wants... but he also can't get to anything to provide that equal and opposite reaction to return home. He just drifts away in space forever... A human Voyager.

See, space is really big and the likelihood of hitting something at all is really small... you could go light years and never have an impact

tl;dr- He'd get restrained by chains, then become a test subject at some secret research facility with the goal of discovering how his body apparently violates the known laws of physics.

He'd be wrapped in chains, then studied.

We'd probably just wrap him up in some chains until a more customized aperture could be constructed. Probably something like a steel suit, except it wouldn't be mobile or cover all of him. That way he'd be restrained, but scientists would still have easy access.

Some answers have suggested blasting him off into space – which would seem like a neat idea, if we actually wanted to get rid of him. But, we wouldn't. Because he's freakin' invulnerable!

I mean, seriously, the guy can survive being strapped to a hydrogen bomb? Can he survive the hottest temperatures we have, above which all of our current materials melt? Such amazing abilities would make him an incredible scientific curiosity!

It'd probably be the case where the first major military that hears about him will steal him off to some research facility and cover up any claims of him having existed.

Note: He's not that strong.

In terms of physical strength, his maximum output is equal to that of a bull elephant (estimated to be able to lift 9000kg.

His max lift of $9000 , mathrm{kg} ,$ while impressive for a human, is still beneath the rated working limit for many common chains, much less our strongest chains, much less many chains. So he's super-strong for an individual, but a far cry from being unstoppable.

This answer's based on his strength being so easily contained. If he were orders-of-magnitude stronger, then other suggestions based on containing him using fire-hose-like techniques would make more sense.

But as long as he can't control his momentum, e.g. as superheroes who have the power to magically fly, he's not that dangerous to a prepared society. Like any murderer, he may be unfortunately dangerous at the start of his rampage, but he wouldn't be too much of a technical problem once people know about him and have some time to prepare.

Dig a deep hole, build a big bonfire in it, once the fire is burned out, and all that remains is ashes, surround the hole with people for him to murder. When he comes over to murder the people run up behind him, and kick him in the ash hole.

With sufficiently deep ashes (like up to his waist), after allowing him to thrash around for a bit down there, he'll be covered in ash, which will help the steel stick to him. Then you dump molten steel on him, the molten steel will cover his top, but the ashes will prevent him from climbing on top of it. The first layer should be around a foot or so thick, and once it's hardened, you should have encased him fairly well up to the hip. After that it's a matter of doing that a layer at a time so he can't somehow swim up through the molten steel if too much is added at once. Once he's fully encased up to his hip over the head, you can either leave him there, and hope humanity has left by the time it breaks down, or you know, toss him into jupiter like a previous answer said.