The star/creator of “It’s Always Sunny in Philadelphia,” Rob McElhenney, talks to a crowd at UCLA about the origins of the great Green Man character. It turns out that the green body suit that Charlie wears as his alter ego in “Sunny” is based on a real dude Rob is friends with who is also a practicing doctor and he actually does this at games.

How cool would it be to go into surgery and see green man hovering over you?

Scene from “It’s Always Sunny in Philadelphia” in which Frank and Charlie are tripping on acid while the guys try out for the Philadelphia Eagles.