The room with no art in it at the top of a stairway (mentioned here) was, for me, the most haunting moment of Mad Homes.

I looked and looked for the art in the room, and all I found was a smudgy spot partway up one wall, near a corner, which cut off with a crisp line of cleaner wall on the bottom.

On one spot along the smudge, there was a pool of a stain, with drip lines running down from it.

This was where someone slept in their bed pushed up against the wall—the smudge of their sleeping left after night after night. The stain was when the now-ghostperson, sitting up reading in bed, spilled their coffee—or their wine.