2 Part Technique - The more difficult your competition, the more crucial all of the little details become. That's why Marcelo moves with the belief that it's his only chance to win, because more often than not, in hindsight it's true. Take for instance the tried-and-true Over Under Pass vs Half Guard. The pass is so high percentage when done correctly, that Marcelo makes extra sure to tighten up on every detail and dedicates all of his effort in scoring the points. In terms of upper body control, keep your shoulder very high and your head tight against his head while holding the overhook down with all of your weight. In terms of the lower body, continually drop your hips down until your opponent gives up and allows his knee to touch the mat for the pass. After you clear your leg, make sure to establish with a good Underhook & Head Control squeeze from Side Control.