Is this the craziest downhill mountain bike pass of all time? If not, then it's certainly got to be a strong contender.

We're not sure about the origins of this video - please give us a shout if you know - but wherever it's from, and whoever the riders are, it makes for an absolutely mad watch.

One rider has just finished taking on a short technical section when another comes bombing over him and rockets past. We can only assume that the former was shitting bricks and the latter has some gargantuan balls. Best not try at home folks!

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