WTF, How?

The driver was most likely NOT seat belted in at the time of the crash. I have seen a lot of people that drive those big truck that think they are invincible in such a big rig. I had a personal friend that rarely wore his seatbelt and met his demise one evening on a trip to his mountain cabin. You almost become a Ping-Pong ball inside the cabin. Very sad thing that this happened.

 

From the looks of the truck, he hit something considerably more substantial after hitting the Geo.

 

Yep. Worked on many dead folks that would have walked away unharmed from a fender bender but died because the seat belt wasn't used. If nothing else, it keeps you behind the wheel so you can still do driver type stuff.
Some people don't understand G-forces.

 

People are pretty dumb sometimes. It's really sad when the only person in a vehicle wearing their seatbelt gets killed because an idiot in the back seat didn't wear it. Anything not tied down in an accident becomes a missile. That includes people.