Underworld Out-of-bounds Clips
You can go out of bounds in the underworld (in caves or dungeons) to clip out of bounds and pass through walls, often putting you into a different dungeon.
These clips are the defining feature that distinguishes Major Glitches and Hybrid Major Glitches logic from Overworld Glitches logic. Many of them are used in the "Restricted Major Glitches" mode of vanilla speedrunning.
The following clips are expected in Hybrid Major Glitches:
Other clips are allowed in HMG but out of logic: