Braisler: Meh, was my first wish as well, so ...
(there are youtube vids with failed tricks as well
)
It is sort of like being on your own trampoline, but I intend to use it to go running. It's supposed to double your speed roughly. You can use it to do tricks, or parkour as well.
Just jumping up and down would get boring really quick I would suppose. I used to have a bed to do that, 20 years ago
Ratbastid: So far, I've only ever fallen forwards, so no busted ass to report at the moment... *knocks on wood*
Wrexify: I believe 300$ roughly, I'm not sure though. The price of these things in the US are a big mystery to me. I got them fairly cheap, since I got them directly from a reseller (A friend bought one lot through his shop, but only for friends, and sold them to us without a markup)
We're currently looking into setting a little thing up with this group, but I haven't yet seen any others around here. From what I can gather on various sites, (and the vid above) there are some groups that organise get-togethers though. That ought to be alot of fun (and scraped knees I would assume)