in a club once where i was just planning on taking e, some acid made an appearance when i was already rolling pretty hard. i took some and the trip was great while i was peaking and i got this super warm, fuzzy feeling and the whole club basically transformed into a beach for me and i was just lying down on the "sand" on the side of the dancefloor watching all these people dance on the beach with palm trees and stuff above me (i think they were like random orbs on the roof in reality). but once I started coming down my trip took a turn for the worse and got super paranoid etc, got visuals that everyone in the club was a devil and the dance floor started disintegrating and i could down below it this hellish underworld with demons and shit.. but comedowns off pills tend to hit me hard and i get really depressed etc.
also once i, again, stupidly took a bunch of mushrooms while i was peaking on a pill, and started coming down like half an hour later and was super paranoid. also, cos mushies don't tend to give you the energy lsd does i was also completely fucked and tired. i eventually fell asleep whilst still tripping balls which wasn't fun.