i've lost count of how many cuts and scrapes i've had, but the worst has to be a 5" angle grinder jumping out of my hand, hitting me in the chest (not the blade luckily, as it was doing 10,000 rpm) and falling on to the back of my hand.
i have no idea how it managed to miss all the nice important things (like tendons) but all i have is a 1 inch scar.
fortune favours the brave (or stupid) i guess :-?