I dont follow speed runners. I know there is a corner hop hack to skip most of the game in Zelda: OoT. Is it common across other speed runs, or is this a reference to that specific bug?
This is very common in speed running for almost any game. Similar exploits are often engine related as well. Once you find an exploit for one source or unreal game, there's a decent chance that other games built on similar versions will share it.
Super Mario 64 has some weird ones like that. I think you slam yourself into a corner walking backwards or something and that gives you super speed to skip through some levels. There is this whole "quantum Mario" stuff in the game.
What you're describing is the Backwards Long Jump. Due to developer oversight, Mario doesn't have a maximum speed going in reverse. Mario can long jump repeatedly in reverse against stairs and similar collision, causing him to build up a ridiculous amount of speed until he's going so fast that he bypasses the wall collision. He's on one side of the wall on one frame, and on the other side by the next. Since the game only checks his collision every 4 frames, he goes right through.
Think of a game you've played recently or enjoyed in the past, and do a YouTube search for "game name GDQ". It's fascinating to see a game you know a bit about be torn apart by glitch hunters and superhuman speedrunners!
In Alien: Isolation, there's a glitch to get through certain locked doors by binding "jump" to the scroll wheel and pushing yourself against it. It lets you phase through.