Muppet fans know that some characters evolve while others just spring up from out of nowhere. Cookie Monster, for example, began life as somewhat more ferocious-looking monster (the row of sharp teeth helped) in several commercials before being toned down and brought to Sesame Street.

In the clip below, a pre-Sesame Street Cookie Monster devours a machine while the machine describes how it works and what its many functions are. Actually, it only has one main function, but you'll have to watch the clip for that.