My dad was on the deck of the USS Saratoga back in the 70s.
He witnessed a cable failure one day and it chopped one guy's legs off, so fast that it was like a block of tetris cubes simply moving down a notch and the foundation disappeared. Amputee in seconds, out in the ocean. Not a good situation. Rare, but at least the people in the video here kept their legs hopefully. Incredible that the one guy jumped over it twice like that.