That used to be our sneak in entrance. When we were much younger (the early 1980's), we'd go down that hall and act like we belonged there...got a few looks but always were able to skip the line and hop right on.
When you're exiting the ride you walk up a flight of stairs and turn left where the onride photos are. If you continue straight instead of turning left there's a hallway that takes you to the load platform.
"You are about to discover what lies beyond the fifth dimension, beyond the deepest darkest corners of the imagination....inside the Twilight Zone."