Every time they cut a sheet, they have to work their way through the maze to get it to the guy who is hanging it. The stud bays are open in many of the walls, but because the walls in the middle are only 4 feet high, you can't step through them.
So it takes 3 guys to pass a cut sheet over to the guy who is going to hang it.
I think they would have been better off putting up the perimeter walls first and leaving the middle completely open with a clear path to the cutting station, much like painting a floor. I'm sure they are experts by now though and realize their mistake.
It's really cool looking though.
