I was at a friends house and she had hired the movie 'I know what you did last summer'. The CO and wife were staying there but in a caravan out in the front yard.
So here we were giving out lungs plenty of exercise by screaming away when in walked the CO!
He had heard us screaming and thought something was wrong. We thought he was out doing witnessing but turns out he had been hiding in the caravan!
When he saw what we were doing he give us a right telling off!!! (I was so embarrassed.... )