The person beneath the door was struck by it as his gun was struck to the side. Then, with two more kicks from Ong, he lost his balance and fell forward, just in time to meet Ong's knee!
With a cracking sound, the person's head took the blow and fell to the ground with a thud. He lost all his senses as his eyes glazed over. He was dead!
Ong picked up the man's gun and, after shooting him twice in the head to ensure that everything was fine, he headed out to drag the two corpses back. After placing the door back in place, he quickly scanned the monitors.