When celebrities are referenced in one part of a fictional work, and then appear in another. Best known for Matthew Perry in the West Wing, who was referenced as a famousactor in one episode, and then guest starred as someone else in another.
The fact that Donna knew who Matthew Perry was, but didn't think JoeQuincy looked like him is a Matthew Perrydox.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).