Ok, I saw this one and immediately thought back to my favorite hazing prank. I was in Army Aviation, and besides the typical runs for rotor wash and exhaust samples(collected in 50 gallon plastic trash bags of course), my favorite was the echo test. We would tell new soldiers that as the turbines on the Blackhawk took too long to disassemble and inspect, we had an "echo test" to do basically the same thing. We would grab the closest technical-looking instrument(usually a micrometer or a tensiometer) and have them shout into the exhaust end of the engine (not running) until we got a good reading. The record was about 15 min of a brand new private screaming into the exhaust of the turbine in an otherwise relatively quiet hangar. Good times.