LSD is a stimulant and psilocybin is a sedative. I once read an article which showed brain scans of people on trips. The LSD user’s brain was lighted up, while the psilocybin user’s brain was mostly dark. That fits with my experiences. On mushrooms, unless I deliberately occupy my mind, the gravity of the drug pulls me into a twilight consciousness. (I have never actually fallen asleep.) With my brain in partial shutdown, I constantly feel like I’m missing something. This condition seems to generate paranoid thoughts, though none that I actually believe in.