I was thinking kind of the opposite. It looked to me like at first he complied, showing what was in his pocket. Then it looked like he thought about his situation a little and decided he didn't want to get taken into custody. Pure speculation on my part thinking maybe he had other issues, warrant, other things in pockets, probation. In any case it seemed he decided he needed to get out of there somehow. He didn't want to shoot the cop and the cop didnt' want to shoot him.
They were both very lucky to come out of that alive.