LSD, Mescaline, or Psilocybin I have tried them all, in a rural
environment with good friends (best is to have someone with you which have tried it before) one seldom get a bad trip.
Have anyone seen "Up in smoke" with Cheech and Chong ?
It is classic scenes in the beginning when Cheech take acid for the first time and he gets really paranoid but Chong calmes him down and ends it with a scary booo and they booth starts laughing. I saw it recently (found a torrent).