An officer can force you out of the car, legally, and, if you have your cell phone in your hand, he could mistake it for a gun and kill you. It's enough to make me never want to leave my house.
If it makes you feel better the police can probably also break down your door on a no-knock warrant for the house next door and shoot you on your couch.
I'm sorry, I might be too unreasonable in my expectations, but the Bill of Rights are fundamental, basic starting rights in the United States. I think every citizen should have a basic understanding of just them, if nothing else.
Knowing your rights is important to not be taken advantage of. This should be taught in school.
It doesn't amaze me, sadly. These are hard things to know.