I read a more thurough(sp) write up of this accident in my local paper. Apparently this fellow fell off a roof and landed on a co-worker that was using the nail gun. I've used nail guns before and the safety is built into the barrel of the gun. You have to press it against a surface and pull the trigger to fire a nail. Most people just hold the trigger down and touch the barrel where they want a nail. That being said it would take about 1.5 seconds to fire off 6 nails. I think this has to fall under the realm of freak accident.
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