LOL!

Ok, while I know (hope?) that was satire, I have witnessed that
type of calculated antic in my own cats. As you know, I have an
outdoor enclosure and one of the clowder can't operate the cat flap
so I prop it open so she (Bonnie) can go out and come back in when
she wants. Shamrock has, on a couple of occasions, knocked over the
device (a hammer) that I use to prop the flap open. I can almost
see it in his kitty expression that he is TRYING to keep her out.  
;)