-- Last Updated: Nov-29-12 1:29 PM EST --
A few years ago I was paddling on a local river impoundment. Little movement on the water, beautiful sunny day with hardly a breeze. As I was returning to the put-in I noticed things looked completely different, and I had to sprint to beat the moving ice from boxing me out.
I've gotten my bow caught as you describe, not quite as bad - in my case the floe didn't break. Still a scary experience!