WTF?!?!?!?! They climbed all the way up there so they can hang off a crane and do what . . 3, 4 pullups, none of them to dead hang or pulling the chin over the bar?!?! Get back in the gym before you go flaunting your stupidity all over the interwebs.
Oh I'd climb up there . . . with a little peer pressure, but no way you'd catch me dead doing pullups off the crane. I'd never be able to get a good workout in as I'd be to busy crapping myself.
It's possible that a life or death scenario like this can illicit an increase in muscle capacity much close to their absolute strength capacity. While it would be a scary and not necessarily productive way to train, I think these guys are just show-offs/idiots.
