So nicki, like most cats, is addicted to boxes. So when a three foot high box arrived and I placed it by the couch, he of course went over to investigate. He climbed up on the couch and put his paw on the edge fo the box, and then vooop! no more cat. He just leaped into the box in disappaeared, knocking it over in the process. Text just doesn't conveey; I wish I'd gotten pictures.
EDIT: ok, maybe it's not the funniest thing ever, but he tried again, first time failing and second time not knocking over the box. He's still in the box after the second attempt.