The rocket explosion knockback in was vector-based. If you jumped exactly 3 frames before the rocket hit the floor, you would achieve a "perfect horizontal RJ," sending you across the entire width of maps like The Junkyard or Power Plant . Current builds nerfed this window to 1 frame (effectively randomizing it).
At the heart of the 18052020 build’s success was the fine-tuning of the grappling hook and the slide mechanic. In previous iterations, the grapple had been subject to "sling-shotting" inconsistencies, where the player’s velocity would erraticize based on minor pixel collisions. This build smoothed out the angular velocity calculations. speedrunners build 18052020
At the time of this build, the SpeedRunners meta and content included: The rocket explosion knockback in was vector-based
But no major speedgame saw a “build” specifically labeled that way publicly. Unless… At the heart of the 18052020 build’s success