|Watch the Movie: Space. Or, option-click (right-click on a PC) on this link to download it directly to your hard drive.
At this point, I sent player two ahead to trigger another checkpoint... but the most horrible thing happened... he triggered the Captain cutscene instead. That means no more outside of the map for player 1.
The cafeteria area, and space directly outside of the bridge are still unexplored... but passing through the loading zone confirmed my speculation.
Note: Be very careful with the loading zone. It is tricky because player 1 is in a location where player 2 cannot teleport. This results in highly unusual things... like player 1 being captured in an infinite death animation in the light fixtures...