I walk into the room grab the shotgun, the lever raises up and then I leave the room. Now when I'm in the room with the ceiling slowly falling I try the door. It's locked. Okay, that's supposed to happen. But I try the door back to the room where I found the shotgun and it's open.
If I stay in the room Barry won't come and I'll become said Jill sandwich.
...Anyone have a clue why Barry won't save me? Maybe I've played the game's scripted events in such a sequence that I can't access the scene...