So, strange scenario: Yesterday, as I was catnapping around one, I wasn't quite asleep yet and strange things started happening. My heart rate quickened, and even though I was fully aware of what was happening in my mind, I couldn't move my body. I wanted to really badly, but I was immobile. Suddenly, pretty colors were every where and I started kaleidescoping like crazy. There was very clear music playing in my head but I was very assured that I had turned off my music when I had lied down. Was this an acid flashback? I've never had one and only taken LSD a few times, and experimented once or twice with Morning Glory. I've never flashbacked before, and didn't know what it all entailed, or if it takes years after stopping usage, or what. Am I crazy? Can someone explain this phenomenon to me?