Just before lunch, the engineers set up the chicken-cannon, loaded a frozen chicken into it, and left for the canteen. The chicken would be just about defrosted by the time they got back to do the test. When they came back, they got behind the protective wall, started the high-speed cameras (to play back in detail what happens), and fired the chicken at the canopy. Normally, it should just bounce off, or make a nasty dent. This time, the canopy was destroyed. Bits everywhere. Having checked the cannon, and looked through the (expensive) wreckage, they decided to view the film, to see if it would provide any clues. It did. During lunch, a cat had climbed into the cannon, lured by the smell of fresh chicken. Poor animal become part of the test.