His opponent seems to be completely unaware of his approach, allowing him to easily catch his opponent, the blast knocking him out of cover, staggering against the fall wall, before collapsing.<br/><br/>If he takes up hi former opponent's position, he can see the situation is pretty bad; there's six doors open along the hallway, with occupants of each firing towards the minimal cover the elevator landing provides. Some of them seem to ahve noticed their fallen friend, and there's some shouting about someone from behind, so he's lost the element of surprise.