Very old thread, but I've just heard a story that seems to fit here. My daughter has been working on a show where the sound guy was very rude and unhelpful, and the (professional) choreographer was sure he had met the sound guy before. Eventually he remembered ...

Around 10 years ago, he was on tour with an internationally renowned classical pianist. They turned up at one theatre mid-tour, where Mr Sound Guy was in charge. So they asked to see the piano, to discover that the only one available was an upright, not a grand. The famous pianist was remarkably generous, and said she'd work with that. Could she rehearse with it? "No, we don't have access until the show starts" came the reply. After some persistance - acouple of hours - they were grudging allowed access. At which point - around 90mins before this internationally famous pianist goes on stage - it is immediately apparant that the piano has not been tuned.