"I cant keep this gun and keep on the phone darling, it's a big shotgun, it will break my arm. As soon as you tell me they're here im taking the safety, uh.. Im putting the safety back on this sucker."
A lesson in here. A "BIG" gun isn't always the optimum choice. Guessing this was a full sized, long barreled 12gauge, she would have been much better off with a 20gauge and with a shorter barrel, or a Judge. She knew that she couldn't maneuver that big gun in a small room. As the movie quote said, you have to know your limitations.
Having enough "hands" is important. It's a reason for tactical lights. Also for knowing how to use the "speaker phone" option (if you have it) on your phone. It's another scenario to think and practice through.