Ever break something you didn't want to?

Trying to help a guy out and find him some 15" hubcaps for his squad car.I told him he could have them if I still had them. I'm in the loft of my second garage looking around. I have a brand new windshield for my wifes GTX up there in a glass rack. Drop a small pulley and it bounces a bit barely touching the glass...CRACK!! Even though it was wrapped and padded it still broke. Nice, very nice. Good thing they keep making BEER.