Originally Posted by genec

Uh, I fully agree...

I think the only lack of understanding may be perhaps in the way I wrote it.

Two cyclists hitting each other will have the meager forces dissipated between the two, due to their nearly equal mass. An SUV, even moving at only 5MPH, will tend to impart all of it's force into the smaller mass of the cyclist.... it would be like hitting a brick wall.

Imagine a bowling ball hitting a ping pong ball.