The actor didn't "ride the Rocket," though. He went underground to check out a photo campaign in support of veganism.
According to the Canadian Press, Phoenix spent about five minutes looking at the black-and-white photographs of farmed animals, on display by Be Fair Be Vegan.
He was given a tour of the photos by Toronto Pig Save group member Anita Krajnc, who says she met Phoenix last summer at a protest at a slaughterhouse in Los Angeles.
He was joined by a group of approximately two dozen pro-vegan protestors and a media scrum. See some footage from onlookers below.
Joaquin Phoenix joins the #BeFairBeVegan Toronto campaign at a subway station, now displaying ads on walls and staircases about animal cruelty. Organizer, Anita Kranjc, says Phoenix is a vegan and activist, and, "He's gonna change the world for us." @680NEWS @CityNews #TIFF19 pic.twitter.com/JeY5fUTdOD— Mark Douglas (@Douglas680NEWS) September 9, 2019
I had the pleasure of tagging along today when Joaquin Phoenix kindly visited the Be Fair Be Vegan ad campaign in the #Toronto subway system. The St. George #TTC station is the place to see these powerful images yourself all Sept & Oct. #BeFairBeVegan https://t.co/R5N4RDWc2U pic.twitter.com/DZrOQ4ud4t— Lisa Kramer (@LisaKramer) September 9, 2019