Slideshow: No Pants SkyTrain Ride
Unaware passengers were in for a surprise Sunday when others suddenly doffed their pants as part of the No Pants Subway Ride.
It's an annual event led by improv theatre performers in dozens of cities around the world.
Despite the cold temperatures, half-naked participants were spotted – and photographed – wearing all manner of colourful underwear at busy SkyTrain stations such as Broadway/Commercial and Metrotown.
Play slideshow above for photos and reaction on Twitter.