The best hallucination I had was on acid. I had a glass pitcher of water and I was sitting in a chair with my face in it (not the water the pitcher). It had sort of a rounded bottom with a flat part so it could stand up. I was just staring into it and the flat part started changing into all different shit. It turned into a bouncing green ball, than the earth, than the Death Star. It was so amazing, I was staring into it for at least half an hour my friend said.

P.S. I LOVE Acid