'V' jump / vault etc, allowing players to get through walls / doors / windows etc when vaulting into staircases or corners filled with non-interactive objects.

Also potentially related:
-Selecting ladders on other sides of walls to walk through wall and climb up/down.
-Interacting with doors / ladders on different floors
-Not being able to climb initial castle stair when holding flashlight, climb/jump winds up going through wall/floor etc. Can eventually get it after some work.