What do you really expect to happen when you open the door of a moving car and start dancing on it? We would have been more impressed if she didn't cream herself.
The caption read: "Good thing I caught it on camera". Never a truer word spoken.
According to CatFish her friend is fine ("just a little ashy" in case you were worried) so sit back and enjoy this until it brings you no more joy. Maybe bookmark it for the next time you do something embarrassing and want to feel less like an idiot.