Or imagine a While You Were Out  segment.  Liz and Roger decide to surprise Barnabas (it seems that there were always  sections of that house that were never finished - there's that wall section in the foyer with the hole and ripped wallpaper).  He comes back and discovers they turned his coffin into a planter (with garlic cloves growing in it) or something.  And Josette's room converted into a late-sixties/early-seventies rumpus room with Peter Max posters, black light bulbs, and a lava lamp where the music box use to sit.
Gerard