Looking at the pictures, it appears that first contact with the Spyder was back some distance. I think the fact that the Spyder was not right behind the vehicle in front of him when hit also played a part in him not being seriously injured. If I'm right, the "squish factor" might have been much greater had he been pulled up right behind the red SUV.
In my mind, another good reason to give yourself more space between you and the vehicle ahead of you.

I'm really happy he got to walk away from this preventable negligence of the offending driver.

Gary