Falling Midair Rubberband (FMR).

By storing a midair and crouch-walking off of an elevated surface onto a ledge (with a gap below, such as a hatch), you can consistently force a downwards rubberband after a short delay, allowing you to get on top of high objects that are 1 floor below but normally inaccessible. Pretty niche tech but still useful sometimes and good to know about. Might help with indoor spots or unpatching local only spots.