Six months later I came back to Los Angeles to visit my parents. I got in late, so I turned on the TV to unwind. David Letterman was on. I hadn't watched Dave since my acid trip, but the show seemed strangely familiar.

When the Bookmobile bit came on, I was beside myself. I was watching a repeat of the same episode.

Then it happened again. I was frozen with fear as the Librarian handed Dave "Satan's Cookbook."

I took a deep breath and ran to the kitchen for a Pepsi.

Have you ever had a bad trip?