I drive a fair bit on frozen lakes during the winter months. Sometimes on ice bridges, sometimes to go ice fishing. I don't care how cold it is outside, I always keep my window completely open. If the truck goes though the ice, I want to be out ASAP to not get trapped under the ice wondering which side is up ! And I hate cold water ... <img src="/images/graemlins/shocked.gif" alt="" /> brrrrr