All Hangable Ceilings 

I show every hangable ceiling in the game.
Often when I show one of the non-obvious hangable ceilings in a video, I'll receive comments from people saying that they didn't know that there was a hangable ceiling there. I'd prefer if everyone were well-informed of all the hangable ceilings, and so I decided to make a video showing every hangable ceiling in the game.
To ensure that I didn't miss a single hangable ceiling, I programmed STROOP to detect all hangable ceilings, i.e. find all triangles with surface type 5. For the most part, this just confirmed the existence of hangable ceilings that I already knew about. The one exception to this was the hangable ceiling in WMotR on the underside of the cloud. I didn't know about that one beforehand, and I was unable to find any documentation about it. Hence, I spent some extra time on that one, discussing why it appears to be impossible to grab onto.