Refused Service
A piece of string walks into a bar and orders a drink. The bartender tells him, "Sorry, we don't serve strings here. Get out."
The string walks out and unravels one end of himself, ties himself up a few times, walks back in, and orders a drink.
The bartender says, "Aren't you the string that was just in here?"
The string replies, "No, I'm a frayed knot."
