sometimes life's surreality has a hollow tone

I remain firmly convinced we are living in a screenplay written by Andre Breton based on a story by Franz Kafka.  

It's the director I can't get a handle on.  

Speaking of the Absurd ...

I'm looking for the title of a film I saw some decades ago, as I'd like to see it again.  It was French or French Canadian production, shot in black and white.  Basically, it was about a 'hard boiled detective' type wandering through various scenes.  The only scene I can describe is one where a rebel walks forward on a diving board, is shot, and women divers do a 'Busby Berkeley' sequential dive into the pool, and hold him down until he drowns.  I saw it in the 70s but I think it was shot in the 50s -- but I could be wrong.

Does anyone know of this?