At this point there's really not much showing off. There's a great article on the main site about how shitty it is trying to get good pics. But yeah, that's what appeals to me about it. I can get the fitness in other ways. But to do COOL fitness? That's unique. I want that. (here's that article: http://fatalfitness.com/ptossing/2008/08/increasing-the-flash/)
I think ptossing is way more intense than just doing regular parkour or even just running. I think that's the point though. Ptossing is an excellent way to condition for parkour, or just for being able to move your body in many ways. And since it's different every time, it makes it fun and never boring.