Georges Bizet once visited his girlfriend and tapped on her window -- at the precise moment that her mother was emptying a chamber pot from a room directly above his head.
[Bizet, notorious for his bad luck, also: wrote a symphony and misplaced the manuscript -- before anyone had even played it; entered a composing contest with one other entrant -- and came in second; and stayed up for several nights to meet a deadline -- only to learn that the production had been postponed for a year.]
[The French warning which accompanied the dumping of a chamber pot -- "Gare l'eau!" -- may have given rise to the English word "Loo."]
Sources
Victor Borge and Robert Sherman, My Favorite Intermissions