Kato or Cato, people spell it either way.
Its when a shell malfunctions and goes off in the tube.
Ive seem them in shells, cakes, and in roman candles.....why you never hold a roman candle and fire it, if one of the shells goes off in the tube, say goodbye to your hand.
If a cato happens in a rack that is not properly built. It blows apart and the remaining tubes are scattered and fire in every random direction...ie at the crowd.
This is what a proper built rack looks like after a cato, the rack absorbed the blast and the rest of the guns stayed vertical.
