leave the room for 20 minutes. by the time you return, he will have forgotten you exist (trust me) which will make the next part even more terrifying. while you're out of the room, gather a few of your friends and some ski masks and dark clothes. bust into the room screaming and moving fast. overpower him and get him into a chair. duct tape him to the chair and duct tape his mouth shut. hit him a few times so he knows it's real.Â
from this point, you have a few options. I'm an asshole, so id use all of them:
1) turn off all of the lights except for one lamp and maybe the TV (put on a horror movie though)...point the lamp directly in his face. scream all kinds of menacing shit at him and ask him questions he cant answer: where's the money? where the fuck did you dump their bodies???? etc, etc, etc...he wont be able to answer because he'll have no idea what youre talking about, plus there's tape over his mouth
2) periodically beat him about the body and face with your fists and a small stick. you dont want to hurt him THAT badly, just bad enough that he'll remember what happened. slap him a bunch and he'll start crying.Â
3) finally, get a huge gas can and fill it with water but DONT LET HIM SEE YOU FILL IT. this way he'll think it's gas when you pour it all over him and light a match like in reservoir dogs. dont worry about the fact that it doesnt smell like gas, the shrooms will convince his brain that it is.Â
4) finally, when it doesnt ignite, tear off your masks and turn the lights on. everybody needs to laugh a lot just to emphasize that it was a joke, because he'll still be pretty disoriented (if he hasnt died of a heart attack).
Warn him that this will happen again in the future if he ever takes shrooms in your presence without saying anything. Firstly, he didnt offer you any, which is bullshit. secondly, people on shrooms have to be babysat like 6 year-olds, which is annoying as fuck, so he deserves a bad trip for not keeping you in the loop.Â