My friend's cat has this habit of making a kamikaze dash before leaping onto the bed. He's knocked all sorts of shit over doing it, and also unplugged and broken his computer. But once Zus was sleeping in the bed when the cat did that and there was this crack when the two heads collided.
Another funny cat trick is to put the plastic cover from a CD-R spindle on their head. They'll try to walk backwards out of it, but just end up moonwalking until it falls off. It's especially funny on stairs or those 'cat-trees' because they'll just walk right off them.
AND THUS WAS SPACEMAN JACK BORN
