Why does Nelson do this?

He's a strange cat... he wants to ship himself, plays fetch like a dog, and now wants to be an A.V. component. I don't get it!
Actually, crawling into small spaces has always been his thing. I got him because he had crawled under Mom's work building and couldn't get out. They could hear him meowing, but didn't know where he was. One of her co-workers crawled under to get him. Then, when I was in Atlanta training and he was just a kitten, John cared for him and he crawled under the couch and into a small hole in the upholstery to hang out. Ahhh Nelson...