Doorman is able to place doors within the one-team-only side tunnels between the spawn room and patron, but only on the Amber side, as the Sapphire side tunnels are actual tunnels that aren't large enough to place a door within. As it is impossible to leave the side tunnels once you get stuck in them, this allows Doorman to permanently remove an enemy player from the game with 2 button presses (3 if you count the ultimate to make it a guaranteed setup), but only if they spawn on the Amber team.
Side tunnels need a safeguard that allows the doors to open for enemy players already within the side tunnels.
Side tunnels need a safeguard that allows the doors to open for enemy players already within the side tunnels.