Snagged from Boing Boing: Teaches nearly loses hand from exploding paperweight:
Mark Frauenfelder:
Robert Colla, an instructor at the Ventura Adult Education center was hospitalized with severe damage to his right hand after attempting to squash a bug crawling across his desk with a paperweight. The paperweight, a 40-millimeter artillery shell he'd found years ago while hunting, exploded in the classroom, nearly severing his hand and giving him "severe burns and minor shrapnel wounds to his forearms and torso." Link
click the "Link" to read more and my word is... "duh!" but OUCH!
Mark Frauenfelder:
Robert Colla, an instructor at the Ventura Adult Education center was hospitalized with severe damage to his right hand after attempting to squash a bug crawling across his desk with a paperweight. The paperweight, a 40-millimeter artillery shell he'd found years ago while hunting, exploded in the classroom, nearly severing his hand and giving him "severe burns and minor shrapnel wounds to his forearms and torso." Link
click the "Link" to read more and my word is... "duh!" but OUCH!

An officer I work with told me about an officer that was with our department (unfortunately killed in the line of duty a couple of years ago) that he was in our parking lot and had cleared his weapon for inspection. He dropped a 9mm round on the ground and apparently it landed just right and it fired. Have you ever heard of something like this happening? I'm generally careful with my ammo, but will admit to dropping a round or two and was never too concerned about that round going off.