I really dig the crowd-sourced street-view service, Mapillary, and like to contribute to it, but doing a good job of getting blur-free images is a little tricky. This is double true in dark, under forest canopy trails. So, we solved it with some technology. Enter, a GoPro camera, a gimbal for an RC copter (drone), and some old bicycle parts:
The gimbal is a two axis gimbal which keeps the roll and pitch constant to 0.01-degrees, so it eliminates shake, and keeps the orientation of the photos consistent. The one we got costs around $180, although now I find them for as low as $130 (not my video):
And then we attached it to a makeshift unicycle:
Some post-processing to match it to our GPS and voila!