Parkour videos are pretty fun to watch, and that POV GoPro footage can give viewers quite a thrill, but the Parkour obsessed seem like they'd be kinda annoying to hang out with.
They seem like the type of people who'd spend the whole time jumping around and climbing over stuff, an assumption that seems to be backed up by this video put together by Kuma Films.
But as the video goes on you discover a) of course they're flipping around and jumping off of stuff, they're filming the whole thing and b) this particular group of Parkour enthusiasts seem like pretty chill guys with mad skills. Plus- most of their shirts still have sleeves on them!