Actually, it wasn't really that high, just a few stories up, but it seems to look higher in this picture, at least to me. This was a Calgary Fire Department crew operating on Stephen Avenue Mall. I assume it was some sort of demonstration or training exercise, since I didn't see any fire, or dangling window washer.
This is across the street from the old court building (seen here) on 7 Avenue at 4 Street SW, by the LRT platform, which is being taken down. A granite slab fell from the building onto the LRT platform (nobody was hurt) and the inspector arrived to make sure the LRT platform was safe, and could be reopened. Read more here.