https://www.yahoo.com/news/father-accidentally-shoots-teenage-son-florida-gun-range-194420254.html

Probably most of us have had this happen to us where the shell casing goes into the back of your shirt. One time I found a spent shell casing in my car, that was not my own (wrong caliber). I presume a shell from someone next to me had landed on my head without me knowing it.

I have a burn mark on my ankle from some one next to me shooting an AK

It only takes a second for something bad to happen when you disobey the 4 rules of firearm safety. 

Obviously he was not pointing the muzzle in a safe direction, and his finger had to have been on the trigger.  Two of four rules broken at once, and someone died as a result.

Sad situation, but totally avoidable.

Try sitting passenger rear while the front passenger is firing out of a hummer window.....ouch

'The gun didn't kill my son. I did': Distraught father blames his 'operating error' for accidentally shooting dead his boy, 14, at the 'world's safest gun range'

"The father who accidentally shot and killed his teenage son at a Florida firing range on Sunday has spoken out, saying that it was his 'operating error' that caused his son's death, not the gun itself.
William Clayton Brumby, 64, was shooting with son Stephen J Brumby, 14 at High Noon Guns in Sarasota when he accidentally fired backwards and fatally wounded his son.
'The gun didn't kill my boy. I did,' Brumby told CNN Monday. 'Every round in the gun is your responsibility. When it fires you need to stand to account for it. That's what I've spent the last two days doing: accounting for my operating error."


http://www.dailymail.co.uk/news/article-3674624/The-gun-didn-t-kill-son-did-Florida-Father-blames-operating-error-not-firearm-accidental-death-son-14-says-freak-accidents-happen-sometimes.html