As I was reading your post I was thinking to myself, "Man, I hope he was wearing a helmet." Good to know you were! Does your company issue you the helmet?

I know with motorcycle helments the guideline was if the helmet hit the ground in an accident it had to be replaced even if it looked okay. The impact stresses would cause microfractures in the hard shell, weakening it so that the next time it could fail catastrophically.

Is this the same with snowmoblie helemts? Especially since it hit the ice.

-Blast