Your buddy unless on antipsychotics will tweak the fuck out. Know that at some point he will be feeling the full blown feeling of paranoid schizophrenia. If SWIY does trip with an SZ friend, choose the right environment, and make sure there aren't weapons around. Discuss concerns before using - hey man i respect your right to take whatever you like. You gotta understand though that I can't have you chasing after things that aint there. So, when I say "Charlie nothing's there" you have to believe me.