i had my google map open and was measuring block lengths in a particularly walkable neighbourhood in calgary when i suddenly realised that 3 years back, i would have been measuring people's dental pockets and oh what a joyous revelation that this is my life now: no blood, no fear of malpractice*, no halitosis, no stress. just click and drag on the google map ruler tool, and whammo! 110m - 150m block length is particularly friendly to the pedestrian. now you know.
*not that this was an active fear, but somehow it was always there, in the back of my mind, this fear that i could do some damage if i put my mind to it.