You notice a small piece of rope sticking out of your jacket sleeve. Naturally you pull on it and you are amazed to see an inordinate length fall to the ground.
Then the rope gets stuck.
You then lift up the leg of your trousers and notice that the other end is there and hangs down.
You pull on it, and the rope now moves between the sleeve of the jacket and the leg of the pants.
Then it disappears and comes back into the right leg!
It's quite a comedy between you and the rope, which you can end by finally pulling out a short (or other) at the end of the rope!