Holy crap, that's amazing. If I saw that in a movie, I am sure I would mutter "bullshit" to myself as he was launched into the air and somehow grabbed the powerline for safety.
I can't decide if this guy was amazingly clear headed enough to even think to try this once he was launched into the air, or just wicked lucky.
I have to think if you were thinking too clearly, you might think twice about reaching for powerlines to save you.