I used to roller skate at a rink in northern VA that had a Wurlitzer theater organ. One day a friend of Dad's, conned into doing the driving chore, hauled us to the rink. On seeing the organ, he went to the console, sat, pushed and pulled a bunch of stops, and began to play. Within seconds, the rink manager was running at us screaming and waving his arms. Seems that, in a bunch of those Wurlitzer installations, you can play them loud enough to do structural damage to the building.
