Here's one that I heard from a friend.
Three people were going for a drive. Their names were Shut Up, Manners, and Poop. Poop, who's not very smart, jumps out of the car to pick up a french fry he sees on the highway. Manners (the hero of the group) jumps out of the car to rescue him and tells Shut Up to take over the wheel. So Shut Up is just cruising along at about 100 miles per hour when he gets pulled over.
"What's yer name?" asks the cop.
"Shut Up."
"What's yer name?"
"Shut Up!"
"Where's yer manners?"
"Halfway down the highway, picking up Poop."