My theory on this has always been :
I did not throw it to the ground. I simply let it go and gravity took it to the groung, so what, now I'm being blamed for gravity too !!!...j/k...lol
I always dispose of em' proper like...I let the dog chew em up and cr@p em out the next day and then I make my kids clean up the yard after the dog...its good to have kids...lol
TANK