> once a person hits the windshield, the primary safety mechanisms (seatbelts, airbags, and structural integrity of the car) have already failed, so whatever ha

> once a person hits the windshield, the primary safety mechanisms (seatbelts, airbags, and structural integrity of the car) have already failed, so whatever happens at the windshield will make little difference. There used to be an issue where people's head would go through a window but the glass wouldn't entirely shatter, so the rest of the body wouldn't go through. A deadly broken window collar Source: took the same tech class 2 years in a row, and watched some documentary on car safety _4 times_ each year. Yay for American middle school