That is what happens when there is only one taxiway and both pilots refuse to give way…
You have certainly realized that there are no conflict here and that, a fraction of a second later, both Porter Airlines Bombardier Q-400 aircrafts continued taxiing, one towards the ramp and the other one towards one of the runways of the Toronto Billy Bishop airport in Ontario.
Few seconds before, I was watching both aircrafts getting closer with each other. Being of the same format, it was possible to get a special effect. Every fraction of a second counts when doing street photography so I took several shots and chosed the one that allowed the minimal space between the two aircrafts.
For other street photography pictures: