You may need to be on the bus for this one....

A Deadhead and his dog walked into a bar. The Deadhead said to the bartender, "Can I have a beer? I don’t have any money, but I have this talking dog." The bartender said, "If your dog can really talk, I’ll give you a beer on the house." The Deadhead said to the dog, "Hey, what’s your favorite Dead song?" The dog barked, "Wharf, Wharf, Wharf." The bartender, furious, threw the Deadhead and the dog out of the bar. Once outside, the dog turned to the Deadhead and said, "Maybe I should have said Dark Star."

this was taken from another site on myspace.