When there are no advance tickets remaining, rush tickets may still be available at the venue before the screening. Typically, the rush line starts to form outside the cinema about an hour before the screening. Approximately 15 minutes before the screening, Festival staff will count the empty seats and sell a select amount of tickets to patrons in the rush line. Please note that being in a rush line does not guarantee a ticket to the screening.
https://hotdocs.ca/news/hd24-rush
Inventory can always change. Please double check with venue staff when you arrive if a film has gone rush.