It is possible. but like you said, it's a dumb and dangerous idea
I wouldn't risk a lifetime's ability of parkour/freerunning for a crazy, momentary stunt that i think is dumb and dangerous in the first place.
Now, when the time comes that you no longer think it's dumb and dangerous, then please, please make youtube tutorials, like seriously.
You get what i mean? hehe. im not mocking you. i actually applaud the idea. it's just that, maybe it needs to wait, considering your hesitation...that's all.