Respond to the hypothetical warning of the person above you. Did you heed the warning or disregard it? And what happened?
Then, warn the person below you of some ~grave danger~ (it doesn't actually have to be dangerous, it's funnier if it's something random).

Example:
A: This is my last warning. Do not step one foot into the basement!
B: I heed your warning because I don't want to die. Stranger below me, whatever you do, don't eat the egg!
C: Oh no I ate the egg and now I have diarrhea! Please heed my warning and never ever wear a fedora.
D: Ok fedoras are ugly anyway. Person below me, you are in grave danger. This is my last warning. Never talk to the man in the trenchcoat.
E: Oh shiz I talked to the man in the trenchcoat! He seems friendly enough and asked me for my blood type. Is it bad that I told him? Whatever. Stranger below me, I warn you to never go to that alley.

Please be appropriate! Things might get a little dark here, so don't play this game if you're easily scared.

I'll start: This my last warning. Never ever make eye contact with that old woman wearing the red glasses.

i didn't listen to your warning and i made eye contact, but it turns out she's just a librarian!

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alright this is the last warning you'll get: do NOT drink that glass of water.

oh fudge i drank the water! i feel really sick... coldness spreading thru my veins... i think i'm dying...

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my last warning... probably the last thing i'll ever say is... do not ever touch my body when im dead... cause you'll die too.. and

i heed your warning and do not touch your body because i have a long life ahead of me
but the paramedics didn't listen to me, and they died too

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okay listen to me very closely. NEVER EVER touch the unicorn's horn

Ah whoops i already touched it! What will happen? Will i turn into Sleeping Beauty? Ah no!! I should of listened! *Panic*

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Whatever you do.. dont go in the basement! The cat will bite you if feed it! This is your last warning!

Ah uhm, I actually feed it but he didn't bite me so o.o

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Never, open the door to a stranger

I listened to your warning and missed my pizza delivery :(

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If you don't want to die, never ever wear clothes with a hood outside!

RIP I died

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Never go upstairs, there's a killer

I refuse to listen to your warning, as I didn't see the killer go upstairs

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I warn you, DON'T watch Nickelodeon.

oh no, i watched it and i'm scared!

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DON'T GO OUTSIDE

I WENT OUTSIDE ANYWAYS AND THE CARTEL KIDNAPPED ME

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don't click that document attached to the email

Actually, it's just a We Are Number One meme attached.

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Whatever you do, do NOT listen to the "the definition of hell" tab on my profile.

I did it anyways and I lost my hearing

I'm telling you, don't cheat on that exam

Already did.

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Don't listen to the "the definition of hell" tab on my profile. Again.

I checked out and it's not dangerous

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DON'T TALK TO ANYONE

Well, I'm talking to you so...

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Don't see my "the best anime" tab. It's too beautiful for human eyes.

I checked out, i'm scared for life

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don't say hello

HELLO! hehe im a rebel! wait... oh shiz... the internet police have tracked me down oh nooooo

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hey uh i know this is gonna be a bit of a shock but you're going to die tomorrow if you go to sleep tonight. so don't sleep tonight if you don't want to die.

I slept, and it didn't affect anything?

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Never go into the basement!

I went in the basement and now this mutant zombie cat is chasing me. Please save me.

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DON'T EAT THAT COFFEE CRISP!