"One flew over the Cuckoo's nest"
Even longer ago, a similar glitch alllowed to sum up upwards velocity while running and jumping into a wall, so when finally released, one could fly over the arena. The funny part about it was: Starting from the outside, the inside appeared hollow (a matter of rendering portals, showing the inside only when you pass the hallways), so when you dropped "through the arena", you landed on the "bottom of the world" (there was neither falling damage nor out-of-bounds reset), and people started hiding valuable items in corners of the sky dome ... not expecting others to find them easily.
