Good news, great exercise running up and down the stairs to retrieve your stability ball and I’m sure it took more than one attempt to get it looking like you wanted.
As I look over the scene that looks like a commercial door at the bottom of the stairs like one would see at a apartment building vestibule. Hope you warned the other occupants ahead of time that “I’m doing crazy things for a photo so don’t call the cops, just ignore me”. ;-}. Paul