Amazing you got this shot without a gun pointed at your camera! Quick action by you results in a fine candid. The cop is ready to go at a moment's notice. He does look like he's found something suspicious and is ready to advance with his giant weapon.
This image is rich in incongruities. His helmet design makes him look like a World War II German soldier, yet he is anything but that. His hand grasps a lethal weapon in one hand, yet an innocent bottle of juice is within reach of the other. The car's door is open, suggesting inactivity, yet he stares relentlessly forward, a trigger press away from mayhem.