>when I run my car off the bridge and into some body of water, I'll be able to get out of my car when I manually roll down my window.

>You cannot open car WINDOWS under water, electric or not.

>Nobody suggested opening the door. Not even sure how you got there

Uh, you aren't sure how I got there because I didn't. I never even said the word door.

You cannot roll down manual car windows in a sunken car because the pressure of the water jams the mechanism regardless of what powers that mechanism. In a still sinking car, electric windows do not short out and you can roll them down just fine.