A piece of rope slithers into a bar....?
and jumps up on a bar stool. The bartender looks over and says: "Hey! We don't serve little pieces of rope here!"
Well, this really upset the little piece of rope, and he jumped off the bar stool and went into the restroom and got himself all tied in knots and frayed at the ends. After a while the rope went back out and the bartender said "Aren't you that little piece of rope I told we don't serve little pieces of rope here!"
The rope responded "I'm a frayed knot!!