[Esperante]

Go get that Pink Floyd song off Ummagumma, and speed up the end 16 times faster. it's really creepy!! (yet cool!)

I think that the middle opera lie segment of Bohemian Rhapsody has some sort of backmasking, but I've never heard it, so I can't tell you what it is.

A little off topic, but did you know that several universities teach how to talk backwards? It is often taught to people for coding, and is standard for many CIA operatives. When Kennedy was shot, listen to a recording of the scene. You can hear an agent speaking gibberish, but backwards he saying stuff like 'subject is down...bullet from what appears to be a warehouse.'