When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works. (Image credit: Nintendo) Super Mario Bros. makes for a very short speedrun, with top runners posting times under five minutes. It’s also programmed with a unique timer behind the scenes - what speedrunners call the “frame rule” - that essentially ensures that each level has a certain minimum time that’s impossible to beat. Tool-assisted speedrunners, who program precise inputs to see what a theoretically perfect speedrun would look like, have broken Super Mario Bros. runs wide open, and humans are actually getting close to matching that level of perfection. Back in September, Niftski became the first human runner to successfully match the TAS time on Super Mario Bros. into the start of final level, 8-4, setting a new world record of 4:54.631. Now, another runner named KingOfJonnyBoy has managed to match the TAS into 8-4, but it all fell apart with an important …