Today, we’re gonna do a little thought experiment that will probably make you stare blankly at the wall while your mind races for an hour like it did to me.

Or at least I hope it does.

God bless Reddit for bringing us all prompts like these:

You can go back 100,000 years to a cave that will be discovered by archeologists, what do you write on the wall to mess with them? from AskReddit

Time travel pranks. Gotta love it. Let’s delve in, shall we?

1. Testing

“Test post please ignore”

– Eldrake

2. Ritualistic

Am an archaeologist and can safely say, “No, it’s not ‘ritual'” scrawled on the wall will fuck with us forever.

– TheMinisterTurtle

3. Oops

“Turns out time travel only works once per timeline. Sorry Guys.”

– Commissar_Genki

4. They will come…

This planet shall be our second home.

– Acharya007

5. Man to man

My regards to Steven Hawking.

Tell him sorry I couldn’t make it to his party.

– Sipyloidea

6. They’ve responded

The pulsar map that we included on voyager.

– A**munchStarpuncher

7. Betas

Hi devs, I found a bug within our simulation.

I was somehow transported back 100k years without any of my items but I still have my abilities.

If I could be transported back by tomorrow that’d be great, thank you!

– _Puddingmonster

8. The shadow

They have taken the bridge and the Second Hall.

We have barred the gates but cannot hold them for long.

The ground shakes…drums, drums in the deep. We cannot get out.

The shadow moves in the dark. We cannot get out.

They are coming.

– notmyrealfarkhandle

9. Memes

Aliens.

With a crude portrait of Giorgio Tsoukalos

– _Ekename_

10. Walkers

I’d def put footprints on the ceiling

– haphazzard66

11. Remember me?

Remember me Michael?

Remember telling me that my time machine would never actually work?

Guess what, f**k you and your “rules of space time”

– Walunt

12. Do NOT

Do not the ca

– electricaldogbus

13. Confusion

I bet you’re confused right now.

– Upset_Anything2628

14. Curse you

what I’d do is find out who was in the team and when they were born (before I left).

Then, once I got there, I’d put their names and birth dates on the cave wall, and I’d then put the same date (let’s say 9/9/21) and then I’d write “the curse is true. Your days are numbered.”

– kingkong139

15. The coma copypasta

IF YOU’RE READING THIS, YOU’VE BEEN IN A COMA FOR ALMOST 20 YEARS NOW.

WE’RE TRYING A NEW TECHNIQUE.

WE DON’T KNOW WHERE THIS MESSAGE WILL END UP IN YOUR DREAM, BUT WE HOPE WE’RE GETTING THROUGH.

– A_man_on_a_boat

16. Intergalactic commerce

If leave a bunch of fake records of transactions with an alien species.

Write up a fake history of alien contact.

And then make up a story recording fake history of a conflict between an alien civilization and advanced humans

– IceColdAardvark

17. Question answered

A picture of a chicken laying an egg and a big #1

– MoreCommonCents

18. Wise words

Here may be found the last words of Joseph of Arimathea: “He who is valiant and pure of spirit may find the Holy Grail in the Castle of Aaaargh

– tcjaeger

19. Welcome

You may be wondering why I’ve gathered you all here today

– moeron9

20. The cool S

You know that “S” that everyone seems to remember writing in their notebooks in elementary school? That

– ghostfoxthefirst

21. Programming

printf(“hello world”);

– young_fire

22. Simulation theory

In big bold letters “SIMULATION #54286”. – asimgeker

23. Ads

There are hot milfs in your area.

– Stalin6989

24. A warning

Leave by 2022.

They do not come in peace.

– MageManatee

25. It’s true!

Draw the earth as flat, you will convince 1% of the idiots of the future

– CisWhiteEarthworm

26. It me

I would write my own name, date of birth, place of birth, and anything else generic that would identity my present self.

This isn’t really messing with them, but it could make my life a whole lot more interesting, that’s for sure.

– TinnieTa21

27. The return

“In 100,000 years they will return. Beware.”

– wws4990acct

28. Futurama

Dear Fry,

Our time together was short, but it was the best time of my life.

-Leela

– VapidHooker

29. Meta

The URL to this thread.

– redguy989

30. NOT AGAIN!

This cave painting was brought to you by raid shadow legends

– that_sweet_old_lady

I think I’d probably write something like “all the religions are wrong” and see what happens.

But what might YOU write?

Tell us your time pranks in the comments.