Gopro - Swivel mount
here are some videos to show you the result
http://www.youtube.com/watch?v=cYPD5ZZ4OC8
http://www.youtube.com/watch?v=KAPiEbwcEWk
And now in ski condition
http://www.youtube.com/watch?v=63XprUl5DGE
the camera was deliberately oriented too high to see the joint, but in normal use it should move the camera closer to the bottom.