As far as broken windows goes I can't see any broken windows in this nascar crash video
http://www.metacafe.com/watch/3143686/nacsar_wrecks/
If anything I sometimes see the whole glass pop out in Nascar
Like this video for example at 2:14 can you clearly see the whole windshield fly off intact.
http://www.youtube.com/watch?v=vh5GcesvcxM