What's your favorite "walks into a bar" joke?

[red dog 1]

18. Three Zen Buddhist monks walk into a cave and start meditating silently,

a few months pass, and there's a noise outside the cave.

Six months of silence follows and the first monk says, "Did you hear that goat?"

A year of silence follows when the second monk says, "That wasn't a goat, it was a cow."

Two years later, the third monk says, "If you two are going to keep arguing, I'm leaving!"