During the race, an ionizing particle from outer space collided with DOTA_Teabag’s N64, flipping the eighth bit of Mario’s first height byte. Specifically, it flipped the byte from 11000101 to 11000100, from “C5” to “C4”. This resulted in a height change from C5837800 to C4837800, which by complete chance, happened to be the exact amount needed to warp Mario up to the higher floor at that exact moment.
The genie granted two wishes at once. The other was from a speed runner.
https://www.thegamer.com/how-ionizing-particle-outer-space-helped-super-mario-64-speedrunner-save-time/