How to shoot the Human Cannonball

Here's one from the archive. On the Grand Concourse of the Iowa State Fair, a crowd gathers, a dare devil is loaded into a howitzer and blasted through the air into a net. One photo doesn't do the trick and a series of photos would not tell the story. It happens almost too fast for video. But a still photographer, who knows how to work in layers and blending can make it work. Anyone want to know how?