He sat at his monitor, playing Security Breach while recording it to post on Youtube. You were watching his screen as he was in the first part of the game as he saw one of the security bots. Like normal, he started talking to the game.

Mark: "What? Got something to say? Say it to my face-" he suddenly stopped talking when Chica appeared out of nowhere. "OH! HEY- WAIT-WHERE DID-YOU COME FROM-" he died in the game after that.