If a driver of a truck weighing 46,000lbs going 0mph was hit head on by a car weighing 4000lbs going roughly 60mph would the unseat belted truck driver be thrown from his truck?
my educated guess is that the car behind you hit you and slowed, while you lunged forward and hit the car in front of you, thus stopping you, then the car that originally hit you crept up behind you hitting the two of you from what ever momentum was left over.