Below (2002) trivia:
Darren Aronofsky co-wrote the screenplay and was originally going to direct the film but chose to make Requiem for a Dream instead.
Originally Frank Sinatra's "I'll Be Seeing You" was to be the song playing mysteriously on the record player but the studio couldn't obtain the rights. Benny Goodman's "Sing Sing Sing (With a Swing)" was chosen as a replacement.
Some of the filming actually took place on a WW2 submarine.