I might be seeeing things, but when Milo Janus is jumping rope, he has a chain on. Then it appears it is gone. Then it is back again.....either I'm seeing "things" or I've seen the episode WAY too many times.....
that's a tough one fred. someone brought this up before and i looked at the segment. i can't really tell if it disappears or it just goes to the back of his neck...like it is laying on his back instead of his chest.