Someone I know apparently smoked some synthetic shit and hasn’t been the same shit. He stopped talking to people and just stands there as if he’s in a trance like he’s in another world. He saw someone talking to his ex girlfriend and knocked them out in the cafeteria. And at prom he saw his ex girlfriend and literally tackled her in front of everyone at the dance. On another occasion he just lost his shit and started throwing shit around the room and crying. He got sent to a psych ward and put on medication and has been a little bit better since. He talks and laughs every know and then but he still seems to be in another world. Does anyone know what could have caused this.