Flip Turn
The freestyle flip turn is where races are won or lost — more time is gained or lost on the underwater portion of the turn than almost anywhere else. You somersault into the wall, plant your feet, push off into a tight streamline, and dolphin kick away aggressively.
FilmableFilm this on your phone and TrueForm measures your body mechanics and tells you what to fix. You get angles, not a made-up score.