I've seen a few combinations of flipping with jumping on and off, or on into on off then flip it again, as well as the sledgehammer deal. I just got mine when we got a tyre changed on my truck at work. It's not massive but neither am I so it should do for now.
My rugby club has a harness with elastic band used to hook onto a car tyre or similar. You start running and once the elastic is stretched you have to keep powering on or you end up with a start and stop rhythm. The first time we tried it I decided to do a lap around the pitch, it seemed like a good idea at the time but 200m later not so much.