I started using my Hero2 by rolling video every chance I could remember to set it up.
Alot of the video wasn't worth keeping but I was able to snip some fantastic "still photos" from the video that would have been impossible for me to capture otherwise.
That is still my primary use for the camera.
I wish I had this back when my kids and their friends were learning to ride.
The wife or I usually rode "sweep" and weren't fast enough with the camera, or too busy dealing with the terrain, to capture alot of the truly great action shots.
I rarely take other pictures or pack other cameras because of what I find in the the videos.
It works for me...