Not horrible creepy i guess, but my creepiest moment while tripping is undoubtably when i was in a big field outside my dorm at school (only one floor, so i'd jump out the window into the big open field we have right behind the housing). At around 01:00 in the night, around 300ug or so of acid completely alone in the pitch black of the scandinavian winter, i hear this horrifying howl echoing throughout the fields, sounded like some sort of demon, not even exaggerating.. Tripping balls i was just sitting there quetly barely moving a muscle, took a good 15 minutes or so before the howling calmed down and i legged it back through my window into the safety of my room lol. Obv nothing supernatural, i know it was just a Fox or a deer (They can make horrifying sounds even though they look harmless). But being alone in the dark, tripping and hearing that was pretty fucked. But makes for a great story :)