Quote Originally Posted by Tyme2fish View Post
Make a big swirl with your jeans trapping all the air you can and go under water. Fill the rest of your jeans up with air by blowing into them.

Much easier said than done when you're in water over your head. Give it a try some time. Wearing a life jacket is much much easier.
Much easier said than done, is right. That former special forces guy with the survival show on cable tried it crossing a mountain lake and gave up about halfway across.