The short subject Bubbling Over finds Ethel Waters as the janitor's wife in a Harlem apartment house who is the only working member of her household. In a situation that predates her role in Cabin In The Sky Ethel has a lazy good for nothing husband who has the job, but Ethel does the work.
But the main reason for seeing this film is to see Ethel Waters deliver two sad ballads as only she could do. Waters was appearing on Broadway at this time in As Thousands Cheer and while the songs here don't match Heat Wave and Suppertime which Irving Berlin wrote for her, they certainly fit her mournful style perfectly. You won't forget Darkies Don't Dream after hearing her sing it.
Ethel Waters, nothing else to say.