Frayed Knot

So, a piece of string walks into a bar...

He asks for a glass of water, but the bartender says, "Sorry, we don't serve string." So, the string, furious with himself, storms out. He starts thrashing around and pulling at himself until he finds himself all tattered and tangled. He walks back into the bar and asks for a drink again. The bartender says, "Hey, aren't you the string that just came in here and asked for a drink?" The string replies, "No, I'm a frayed knot."