Benny

If you're going to betray your people for money and befriend one of the most ruthless leaders in World History, you deserve to be outdone by your own ignorance.

Take Benny.

He successfully masquerades as a taxi cab driver and infiltrates the rebels, gaining Douglas Quaid's trust. He leads the dictator's army directly to the Rebel leader, who they assassinate.

Then Benny corners Douglas Quaid, the Rebel army's last chance to save Mars, and what does he do? He attacks him with a slow moving, drill-equipped construction truck.

Not a gun; A big truck with a drill on the front.

I realize the opportunity to yell, "I'm gonna drill you sucka!" must have been too tasty to pass up, but he could have just shot Quaid in the leg, and then drilled him to the wall.

Of course, Quaid side-stepped the drill, grabbed his own manual drill to kill Benny, and went on to save Mars by giving the planet atmosphere. Benny actually managed to save Quaid time by drilling a hole in the cave wall that led directly to the atmosphere on/off switch.

Be better than that, Benny.