I've just spent a day playing on the trials bikes with a mate, Phil. You would've enjoyed it!
I have heaps of footage to edit. That's the hard bit I find, cutting hours down to seconds.
We did some experimenting with mounts. I think the pick of the mounts and camera positions we played with today were of course the helmet mount, and the RAM handlebar mount upside down and looking back at the RHS of the bike and brake foot (and where you've been) and also the chest mount. The chest mount turns out not too bad. You can get a bit of a perspective on the bars and hand controls while seeing the obstacles, and it tends to follow the line of the bike rather than where you're looking.
All good fun. A great way to spend a cool to cold cloudy day.
Al.