Image by Markus Reugels
This German photographer uses a high-speed camera and a macro lens to capture liquid droplets hitting water. He uses a technique were he releases two droplets in succession. With it timed correctly, he is able to get shapes similar to a mushroom or disk. The distance the droplet is released determines the shape that is formed. He uses a flash to freeze motion rather than a shutter speed.
The link: https://www.dpreview.com/articles/7156408959/macro-highspeed-lighting