Ken Burton, president of Panama City, Florida-based Stark Survival, a certified Air Force instructor, offers this advice for those who might find themselves underwater in their cars:

Open the window as fast as possible - before you hit the water, if you can, or immediately afterward.
Stay still, with your seat belt on, until the water in the car goes up to your chin. Then take several slow, deep breaths and hold one.
Do not try to open the door until the water has stopped flooding into the car. Initially, the water outside will put pressure on the door of up to 600 pounds a square inch, meaning you won't be able to open it from the inside. The pressure inside and outside the car should equalize about the time you start holding your breath.
If you can't open a door and you're trying to break a window instead, aim for a side window, never the windshield. Windshields are several layers thicker.
Don't take off your seat belt until you have opened a door or window. Grip the steering wheel before you unbuckle. You'll need something keeping you tethered so that you can pull yourself out of the car.
Once you're out of the vehicle, let your body take you to the surface. As Burton put it: "Don't worry about going up or down. When you take all those deep breaths and hold it, it's like you're inflating a balloon."
All of that, Burton said, should take about 30 seconds.

Source:http://m.naij.com/news/41013.html

Indeed, one learns everyday.

scary but helpful

COME OUT N FISH WILL EAT U.EVERYTHING IS WATER.WATERCAR N MAD WHITE WILD BRAIN.

not sure that will work in this muddy calabar river