The Planche
The planche is the holy grail of pushing skills: your whole body held horizontal and parallel to the ground, supported only by your hands, arms straight. It demands extreme straight-arm strength in your front delts and serratus, with scapular protraction creating the 'shelf' your body rests on.
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.