[Minn]

As Mythbusters demonstrated, if you plan to drive into a body of water, be sure to have something with that can easily break a window. Otherwise you are trapped in the car until it flips over a few times and sinks. By then you can't get out.

unless killing yourself and your passengers is your intention, of course.

[Responsibility2nd]

Really?

I’ve always understood that as a car enters the water, the pressure makes it impossible to open the door. And once the car is fully submersed - also - you can’t open the door.

But there is a middle ground. As the car is filling up with water - there comes a time when the pressure inside and outside of the car is the same. And at that time, you can easily open the car door as if it were parked in dry land.

The key is not NOT PANIC! Wait until that opportune time. Swim away.

(Learned from the Teddy Kennedy School of drinking, driving and diving.)

[Nickname]

I think that something needs to have a small surface area too.... A small hammer vs. something like a brick that will just go thunk thunk thunk. If I remember right.

[Netizen]

It should be noted that they tried several things to break the window and the only thing that worked was the emergency window breaking tool.