If you step through that scene frame by frame, you will find that the only reason Cruise's character survived is because he was going up against a street punk. After getting out of the line of fire, Cruise released the guy's had while he went for his gun. The punk had his gun back on Cruise while Cruise was still trying to get the gun out of the holster. The only thing that saved Cruise was he was inside the punk's OODA. Of course, if the punk had been a trained and experienced killer, as Cruise was supposed to be, he would have known how sticking the gun in Cruise's face was just begging to have the gun taken away. Now, that would have been impressive - Cruise takes the punk's gun and, while holding the punk in a wrist lock, kills the punk's partner (with the punk's gun) and then the punk.