Running On Ice

I agree with this:

"Why is ice such an effective teacher? It’s slippery. It requires great balance, coordination, and proper form to prevent slippage."

I did a run on snow and ice last year that illustrated this perfectly for me.  My foot moved on ice like a center of force diagram: it moved back, and then forward, but not out-from-under me. 

Good form will go a very long way towards eliminating falls on ice and snow, and ice and snow are the best teachers of good form.