Crashing is natural.
Well, nearly.

I was laughin'... Then I was flat on my arse in the mud. But still laughin'
Superslide, Wharncliffe Woods, Sheffield
Picture by Antony Hawkins

You can crash wherever you are. Even on legal trails like this one.

The Superslide is fairly well hidden, even when you're falling down it, due to the dense forest it runs through. If you find it, congratulations. If you clean it first time down, you're either very good or, more likely, a liar.

It is just so much fun though...