An STM bus caught fire shortly after it broke down on the Ville-Marie Eastbound today at around 2:45PM. Everyone on board was able to get off before the flames broke out and were immediately picked up by another STM bus which happened to be passing by.
The Montreal Gazette has a great video of the scene here.
Discussion: http://www.montrealracing.com/forums/showthread.php?885474-STM-Bus-Catches-Fire-On-Ville-Marie