This is the door that separates the main body of the Beast Vault Z-26 interior from the side chamber into which Conrad Gall is thrown by Lord Ondorru in the jump cinematic. If the player elects to pursue Ondorru over helping Gall, this door closes in Cinematic. Otherwise it remains open and the player can enter the area to engage the Rancor within.Before the cinematic this door is in a "Safety" state which has collision but is not visible (preventing players from entering the area beyond before we know if the door will be closed or not).