PsilocybineMyceliumMysticismHallucinogensPsychoses, Substance-InducedSerotonin 5-HT2 Receptor AgonistsLysergic Acid DiethylamideFruiting Bodies, FungalMushroom PoisoningMescalineReceptor, Serotonin, 5-HT2ASpiritualitySerotonin Receptor AgonistsAttitudeStartle ReactionPsychological TestsInhibition (Psychology)Cross-Over StudiesDouble-Blind MethodBasidiomycotaAgaricalesStreptomyces