Just saw http://www.youtube.com/watch?v=BDZ0X14SGZI&lc=am__1_zTP-Y22EW3j5zYUfB4t_p4IBHgUwO-h83bp7E today. (Contains blood. Don't watch if squeamish - warning at start of video also)

Have to admit it's made me a little more cautious about parkour. I got to thinking, this could happen to anyone really.
So I'm curious: What dangerous situations do you put yourself into for thrills/enjoyment?
Do you think it's worth the risk doing these things?

I'm still keen to try out pretty much everything in http://www.youtube.com/watch?v=A3PDXmYoF5U video, but when something goes wrong like that you really see how risky things can be.
Lucky escape for that guy though

Oh and warning for the second video: it's filled with pure awesomeness!

I wouldn't mind putting myself in danger for a thrill. Deep sea diving and sky diving are both things I really want to do, but haven't had the chance to. Of course, with all proper safety precautions and what not, I'm not suicidal, but I'm not a total shut-in coward either, I don't mind taking risks.