It's not one that'll be in my bag of mad stunts any time soon.
What i meant was, other than looking comical and breaking forks, what are they good for? I can't imagine you'll get any further than you would with a standard static gap, and people i've ridden with who do like doing them just prove this point. Up to fronts, fair enough - you get higher, further, whatever, and to be fair they look awesome. Down to's just seem utterly pointless.
And you couldn't say that to every move, they're easily justified...