The Blind Projectionist
If you've ever looked backwards in a cinema you'll have seen a small window close to the projector. This is so the projectionist can check the image quality and focus, and generally keep an eye on proceedings below in the auditorium. Once, between contracts, Paraglider found himself looking after a 3D Projection Theatre in Saudi, for Aramco, and was surprised to find a wooden slatted venetian blind fitted to the viewing window. It seemed to have no purpose. Until Ladies' Day in the Theatre. Then he had to run all quality checks before the audience was admitted and, throughout the show, the blind was to be firmly closed. This, merely to ensure that the ladies could enjoy the performance without being seen by any man. Now that's paranormal!