If you have used one, it is quite easy. You hold the safety sleeve against
the wood and fire. The nail misses the edge of the intended wood and flies
through the air. Reach up over the edge of the sheeting from below and fire
it back at yourself. It usually goes into the wood and you don't have to
climb on the roof.
"Twayne" wrote in message
I do, yes as the safety had to have been removed from the nail gun. Unless
it was pressed against the skull and the trigger pulled, it should not have
fired the nail. But then, any tool in the hands of the right dummy is
unsafe, regardless of the safety devices installed.
And where did you get the "100+> mph 1-3" deep into wood ..." bit? It's
nonsense and makes as much sense as removing or toying with safety designs
provided with the guns.