This never happened before

Date: 12/12/2016

I dreamt I was working as a security guard on an armored truck. I worked with another man and a woman. I began to realize they were stealing money and that they planned to kill me. I waited until I was alone with the woman and I grabbed for her gun as she was about to shoot me. I grasped her gun in my left hand and tried to twist it away from me. I suddenly woke with a pain in my left hand and noted that I was squeezing my right knee with my left hand, and painfully so!