The best would probably be the first time I did shrooms. I honestly thought that I was Indiana Jones for some reason, and I was looking at ancient civilizations that I could see in the details on the concrete outside. When I went inside, I found clues all over the walls, which led me into each of the different bedrooms in the apartment. I opened the door to my friend's room (he always kept it messy), and thought I was in a jungle. I had a stick that I thought was a machete, and I was tossing things all around his room, thinking I was making progress towards treasure. Afterwards, we went for a walk around the apartment complex, where my ex and I almost got hit by a car, freaked out some people playing poker on their deck, and decided we were never finding our way home.  
  
The worst would probably be the time that I snorted morphine. That was interesting.