shit i know this is kinda old post,,, but that shit happened to my best friend when i was a young teenager,,, he was a normal kid until he started taking 7 Extacy pills a day (OD'ed), and smoked a ton of pot. He started talking about "E" like it was a girl or something. Very weird... He ended up doing a lot of crazy shit, like seeing his dead grandfather talking to him from the tv, crashing his car into his house, and thinking a few big celebrities at the time where conspiring against him.
He ended up admitting himself into a mental hospital and stayed there for almost a year... He was told by the doctors, that phycosis harbored in him, and it was unlocked by the abuse of the Extacy.
When he got out of lthe hospital, he started smoking pot again. Although weed didnt make him crazy, it did set his physcosis off every time since his OD.
Some people just cant handle certain mind altering substances, and some people that can handle it, think they're invincible and go overboard.
Either way that kinda shit can set something off inside of a person prone to mental illness.
Just thought id share that story