My trousers came out of the wash one day looking rather odd... NB: no tearing or other damage had happened.
They had merely undergone a Topology.

I spent some minutes turning them around and around trying to find the entrance...

... truly, I was Bamboozled. In fact, I needed to go out, so I gave up and wore different trousers.

The next day, I turned them around and around again, and then tried something slightly different, and, lo and behold! My trousers returned to their natural shape.

I put them on and went for a walk in the woods. So endeth the story of my trousers, which shall henceforth be known as the Topology Trousers