What should you do if you find yourself on the hood of a speeding truck? Try asking politely for someone to call the police.
I've never been hit by a car, but I imagine it's a pretty stressful situation. I'm not sure I'd be able to stay as calm as this gentleman seems to be. According to the video, this man was hit by a rather large truck, and jumped on that truck's hood as it tried to flee the scene. Another driver pulls up alongside the truck, and the man politely asks the other driver to call the police. That's poise under pressure.