Not that I'll be riding in the snow, but yesterday, I was worried while going through the mud. The wheels started to slip so I unclipped and road that way until I was on dry ground again. It got me thinking about riding clipless on mountain bikes or cyclcross. How in the world can these riders get out of the clipless pedals fast enough to avoid a fall. I posted this in the 50+ forum, but I thought it would be better to ask here, thanks for any replies.