Sorry, grown-ups are accountable for what they do. In the real world, making excuses like "he told me the micrometer was calibrated," or "he told me the CNC program was proofed and good to go," don't fly.
But how many times has a “gun” been pointed at someone in a movie. Heck even close range. I saw a clip from the Deer Hunter — remember that final scene when Christopher Walken’s character was playing Russian Roulette and shot himself in the head? BTW, Christopher Walken hates guns. Was the gun a prop or a fully functional firearm? Was there a live round in it?
https://www.youtube.com/watch?v=aCW9NsrV6VM
Here is the gruesome scene.