In the world of extreme sports, the guys at Nitro Circus have no equals, as this epic MX backflip shows.

Nitro Circus Keeps Pushing The Boundaries

Is there no end to the invention and daring of the Nitro Circus guys? The action sport collective lead by Travis Pastrana must spend their days sitting round a table and thinking of ridiculously difficult stunts to perform and then working out how to do them and, finally, damn' well going out and doing them!

And it doesn't seem to matter if the equipment or structures aren't available, they'll bloody well build them!

Take this triple back flip, for example. A huge, vertical ramp was built just for this stunt. That speaks of manpower and access to some pretty serious machinery. But, also, it speaks of sportsmen and women who have such utter belief in their ability that, if everything is done right, they'll have a go and achieve what some would have once considered the impossible.

I have to say, this is pretty epic!