A few years ago a 14 pound chunk of cement/stone broke off of an Train bridge and busted through my T-top of my car as I was driving underneath and it knocked me out for a few seconds, when I woke up I had run 2 red lights and had steered into oncoming traffic... It was also pouringt down rain which was a bonus...
HERE is a vid of the news report about it. The large piece of the cement/stone was in my back seat... I actually still have the 5 pieces of it. I was pretty lucky that day... Well lucky that I didn't hit or injure anyone else...
wwoowoww