"I'm John BLANK"

"I'm John BLANK" refers to the peculiar phenomenon frequently demonstrated by Ed where, upon using an adjective to describe himself, he will affect a deep heavyset voice and declare "Oh, I'm John X" where X is the aforementioned adjective. (For example, "i'm so big, I'm John Big"). It is believed that this bit was not in fact created by Ed but by Ed's friend when they were high together.