How is this speedrun possible? Super Mario Bros. World Record Explained Chapters: 00:00 - Introduction 00:35 - 1-1, Flagpole glitch, Framerules 03:03 - 1-2 04:00 - 4-1, Hitboxes, Flagpole glitch #2 05:35 - 4-2, Wall clip, Wrong warp, Plant despawn 10:00 - 8-1, Flag subpixel manipulation, "Judges" 13:50 - 8-2, Bullet Bill glitch, Start delay, Lag frame 17:38 - 8-3, Stomp from below, 242 timer 20:00 - 8-4, Wall jump, Wrong warp #2, Bowser hammers, Timer discrepancy 24:48 - Conclusion Notes: At 0;47, I refer to the console Kosmic is using as the Nintendo Famicom Disk System. He wasn't actually playing on the Disk System, just the Famicom. The Famicom is essentially the Japanese equivalent of the NES, and the Disk System is an add-on to it that reads special floppy disks. At 4;06, I mention that Kosmic holds the Glitchless WR with a 5;06.709. However, there is a video by Scott Kesler of a 5;05. This is because of timing differences. Glitchless is how Twin Galaxies (a deprecated high score website) view Super Mario Bros. speedruns, and its timing rules are different. They time from the start press on the title screen, which, because of framerules, adds a variation of up to 21 frames to the time of the run based on which frame you pressed start on. This timing difference adds about 2.5 seconds, so Scott Kesler's 5;05 was actually a high 5;07 by TG rules, and Kosmic's 5;06.709 is a low 5;04 with regular timing. At 13;15, I say that when the white pixel is missing, the judges are in a bad mood. For the sake of simplicity, I omitted that it's actually a 50/50 of good/bad judges if you don't get the pixel. However, this is frame dependent and not entirely random, and Kosmic rarely gets good judges with the bad pixel, so I took that shortcut. At 26;35, I claim that the theoretical human limit is 4;55.496. The actual time is 4;55.49668, and it should have been rounded up to 4;55.497. There is another framerule that was not included because while it