Hold on to your saddles.
We've just spotted this video of some extreme unicycling, or Einrad downhill, as the Germans rather more nonchalantly term it.
In some pretty impressive displays of balance and control this compilation gives you a sample of just what these unicycling daredevils get up to in the woods.
So, sit back, and watch some skilled unicyclists tear it up in style, using one arm for balance, like a cat uses its tail. And in case you're wondering, they're fitted with disc brakes.
Want to give it a try? There's a WikiHow page for that. Don't worry, it starts with the basics. After that, it's all downhill.
I'll get my coat.