Dream |Convertible Shooting Mob Guy

I dreamed that I was in the back seat behind the driver of a convertible. 

I was looking in the side mirror and saw someone get shot. 

The mob guy then came over the top of the windshield and pointed his gun at the driver and then me. It had a silencer. 

Before he could pull the trigger, I shot him a bunch of times. I kept waiting for him to pull the trigger. The barrel was right in my face. 

But he was dead. I killed him before he got a shot off.