Not a cannon accident, but as many of you know what i think about safety masks and gloves, i get ALOT of cuts while making knifes...
Today i was polishing the spine of a puukko blade (for Sandman) When suddently the buffing wheel grabbed the blade, threw it against the wall, then it bounced and stabbed my left biseb and the dropped to the hard concrete floor. Immediately i "closed" the stab wound and covered it with Locktite, the some rags and duct tape.
Funnyest thing is, that even though the wall has a big dent and my hand is raped and if i saw right, the blade dropped tip first, There is not any damage on the blade it self. Great test, eh?