I get so tickled watching cats get startled! After they come unglued, they always have to sit down and wash, acting like, "Yeah, I meant to do that." Once we had a big kind of flat box from some exercise equipment. One of our cats went inside and the other was at the entrance looking in. DH snuck up on the other end and did a drum roll on the box, and all heck broke loose! What made it so funny was the cat inside the box thought the other cat had made the loud noise, and she kept growling and sniffing at her, like "Who are you, and what did you do with the real Picabo?"