A string walks into a bar and orders a beer.
The bartender tell him "Hey, we don't serve string in here - get out!"
So the string goes outside, rolls around in the street and shreds himself on the curb and then ties himself into a big snarl.
He gets back up and goes back into the same bar, and orders a beer.
The bartender looks at him and says "Aren't you the same string that just came in here a minute ago?"
The string says "NO! I'm a frayed knot!"
*say it out loud*