Ninth Floor is a 2015 National Film Board of Canada documentary film written and directed by Mina Shum about the 1969 Sir George Williams affair, a student occupation led by Black West Indian-born students to protest alleged racism at the Montreal university.

Mina Shum is an independent Canadian filmmaker. She is a writer and director of award-winning feature films, numerous shorts and has created site specific installations and theatre. Her features, Double Happiness and Long Life, Happiness & Prosperity both premiered in the US at the Sundance Film Festival and Double Happiness won the Wolfgang Staudte Prize for Best First Feature at the Berlin Film Festival and the Audience Award at Torino. She was director resident at the Canadian Film Centre in Toronto. She was also a member of an alternative rock band called Playdoh Republic.