High speed photography is a technique that photographers use to capture an action that happens in a fraction of a second. Imagine capturing a picture of a bullet going through a balloon filled with water; Even the fastest digital camera you could buy wouldn’t be sufficient.
Cameras can have a shutter speed as fast as 1/4000 of a second. Pretty fast huh? But not fast enough! At this speed, the bullet would certainly appear blurry because of its speed.
Even though, if you had a very fast camera, you would have to press the shutter at a very precise time to be able to capture what you want. Some very patient photographers did try that, but you end up taking maybe thousands of pictures to get a correct one.