I've had a reaction similar to this on fungi sold to me as "blue meanies". They were small and blue with white fuzz, which a more experienced eye might have called "bruised and moldy". Not entirely convinced that the bad trip was because of mold, though. The others I ate with that night also had bad trips, but I knew other people who ate from the same batch before and after without getting sick or having a bad trip. Bad trips are just a part of the experience, IMHO.