not many great thoughts, but a number of incidences.
i remember once on acid, a few of us we outside on my friend's deck just enjoying the outdoors. at one point i looked up at my friend, and he had a terrified look on his face. i turned around to see what was going on, and right behind me were 3 girl scouts, also standing there with terrified looks on their faces. there was a legit mexican stand off for about 15-20 seconds. finally my friend screamed out, "what do you want?!" they screamed back, "is your mom home?!" again dead silence. they finally just turned and jogged away. it's much scarier when you're on acid.