When I took the Bar many moons ago we could type our essay sections with a dumb typewriter. We went to the main exam room, checked in, and then were escorted to a typing room. Obviously people taking the bar were nervous enough as it was. The guy sitting next to me and I were both typist and knew each other enough to play off each other for a joke. When everyone started looking at our typewriters Mike and I started pretending to set up our typewriter in the main area. You could watch a wave of panic rush over a few people. It probably wasn't a nice joke.