Hack of the Night : How to escape a submerged vehicle

I realize that most of us will probably never be in this situation, but I believe in being prepared.  Say you're chasing after the folks that kidnapped your daughter and you need to use your special skills that you picked up after a very long career in the special forces, and suddenly you end up in the lake.  This kind of thing is right up Liam Neeson's alley, but for the rest of us, not a good time..  Here's what to do if you ever find yourself inside your vehicle submerged under water.