[QUOTE=andruejaysin] "if your soul isn't pure, then the devil will come, and drag your soul down to hell"QUOTE]

That's mean, man.

But yeah, if you really want him to flip out... Salvia will do the trick. But if you want him to fucking go crazy and think that he died or something... well, I'd have to go for the 5-MeO-DMT.