For a few years in the late 1990s my parents moved back to Lethbridge, where we lived while I was a kid fior a couple years, roughly from when I was five to when I was seven. One day while visiting them I tried wandering around town seeing if anything would trigger a long buried memory. No, no, nothing. Finally I got on a bus to save time. Leaving the bus I exited through the back where there was actually swinging doors before the exterior doors, not unlike saloon doors in westerns. Those gave me the flashback I was looking for; my mind has stored that unusual feature of Lethbridge buses all those years!