Solly bangs her head on the bathroom door.
The closed door just seems to be a challenge. Solly banging her head could get annoying after a while. I know the rattle rattle rattle does.
My bathroom has a pocket door so has a tendancy to rattle when my cat puts her paw under the door trying to get it open. It took me forever to figure out why half the time my closet door was open when I KNEW I closed it. Finally caught a cat doing the under door thing til she got it open.