As an ERD-certified rescue diver/ Ice diver, the best advice I can give someone is that panic kills. You have over 15-30 minutes before you have to worry about dying from hypothermia. A lot of people die from the “cold shock response,” AKA panic. When you go underwater, you scream and gasp, causing you to aspirate water, which can lead to drowning. Having a pond in my backyard can be very nerve-racking. It's one of the reasons why I Voluntarily expose my kids to cold water. I want them to experi