Samuel Lee | Martial Artist on Instagram: "Rear leg sidekick is a classic  Oddly difficult to do well but here’s a progression you can try to chisel away at the form. I recommend practicing each step until it can be done proficiently before moving on the next progression. Impatience leads to overlooking details and a lack of detail is what keeps us back from mastery. . #sidekick #taekwondo #karate #martialarts #kickboxing"