Fighter recovers from the gag to grab the villains firearm so that he can whip up with Leo's gun aimed at them and starts to fire off wildly. Truth be told he never used a gun before, he's always been a melee sort of guy, not even a longbow. As such he's aiming for the 10X10 area of where they are trying to get them. He's watched enough burn notice and first person shooters to know you need to pull 'the thingie' on the side to get it to fire but he doesn't know how to clean a jam or even empty the clip when it was all out.
As it is all he had was the moment to kill them or drive them off with the kick spraying his shots wildly as he fought with the gun for control before he shot one of the people he was trying to protect. In truth you never know about shooting a gun until you shoot as gun. Clearly this was a skill he needed to build up when he got a chance next level.
Achievement unlocked: Gunsmoke and mirrors (use deception and firearms in the same fight)