Cat Crawl

My cat Shark has a flat butt crawl that I call the cat crawl. When he flattens his back haunch down and starts crawling I know he's got a bird or a mole in his sights He only does the cat crawl when he's in full-blown hunt mode. In seconds I see him make a through the air pounce that would give a professional long jumper a run for his money. I keep saying I'm going to put a bell on him, but I do not because it's truly his favorite sport, and the only exercise he gets. He would weigh three hundred pounds without this little dab of exercise.