It may be my old age showing but I didn't think you could exit this building the way you came in anyhow, so going back to the other area isn't an option is it? *One tip is not to bother trying to get the stuff at the bottom of the stairs, as you'll only waste ammo and health doing so. *Just run and shoot your way to the top. *Somewhere up the top I think there's some goodies. *(Not that it's any help if you can't get there!)