Exactly, all it takes is a lawful gun owner enjoying a good movie late at night with his handgun on the coffee table. He is a veteran with PTSD who feels more comfortable at home with his dogs and HK P-30 on the table. The dogs start barking and the Marine picks up his HK just before the door is kicked open. What happens next is anyone's guess.Kicking someones door down isn’t really a simple mistake. Knocking on the wrong door would be a simple mistake. Kicking the door down is well past that.