Cheap High Speed Camera
What you would do is hack the Start/Stop switch and hook it up to some sort of controller that starts each one of these 10 cameras about 3.3 milliseconds before the next one, thus having each frame from all the cameras to be 3.3 milliseconds apart from each other, which is 300FPS at 720p for $158. The cheapest HD 300fps camera.... EVER, not that i can make it. The cheapest equivalent is around 2K.