Is Garbage Supposed to Sting?

A few days ago I was taking out the kitchen trash.  At the same time I was carrying a bunch of things to carry to my car like a pack mule.  Therefore, the heavy trash sack kept rubbing against my leg as I hobbled across the parking lot to the dumpster.  And each time it would swing, I felt a sharp stinging on my leg.  When I finally reached the dumpster, I discovered that there was a piece of glass in the sack cutting my leg with each stroke.

(Please ignore the nastiness of my leg.) BUT, this is after I wiped up the blood and stopped hyperventillating because I was afraid I'd get an infection.  New thing I learned at college:  Do not let the trash  bag rub on your leg :)