A violent ear shattering sound that leaves the listener in a state of panic. Their heart races, they begin to drip sweat and they may even defecate themselves. The sound is to be of the equilivant of a Helicopter crash. Like the one at the University of Indiana Pennsylvania.
As i was sitting in my dorm-room last week, i was almost deafened by a thatter. It so happened that this thatter was caused by helicopter crash a little bit down from campus. G4 must have been drinking that evening. After the Thatter, i had to go to the bathroom and change my shorts.