This interesting video shows you how to improve your chances of surviving a fall through thin ice into freezing water. In summary, the first thing you do is concentrate on staying afloat and controlling your breathing, which will become very rapid due to cold shock. Once you have that under control, which may take a minute you have 2-5 minutes to climb out before you get too weak to save yourself. If you can't get out? You'll eventually go unconscious and drown. Rest with your arms out flat on the ice. With luck, they will freeze in place, keeping your head above water, maximizing the time for rescuers to help you. If you do everything right, you could survive for an hour or two before dying of hypothermia.