Factual error: When the hitmen shoot out the windshield of the yellow Firebird, it shatters into pieces and falls apart. All DOT windshields have a plastic coating on both sides of the glass so that it remains one big sheet, regardless of the many pieces the glass in-between shatters into. No US windshield in the last 40 years is tempered - they are all coated. Side and back glass are tempered. As for objects poking holes and other "possibilities", watch the film before suggesting things that do not occur in this specific crash.