I've gone through a couple of windshields myself because I just did not feel obligated to use the seat belts.... That was just too inconvenient... Of course the first time I wound up with a concussion.... And I got cut up pretty good... The second time I went through the windshield ... then over the hood ...and into the damn pine tree the car had hit... At that point a concussion was the least of my problems... I had some brain bleeding.... Messed up the vertebrae in my neck..... Broke both my arms and my left shoulder.... Broke my nose and fractured my jaw..... When I woke up they were putting a catheter the size of a water hose inside of me.... Just more fun times for Waco...