"Amazing" coincidence only because of the sheer #'s involved: I've run NYC Marathon 4 times. First or 2nd time, I couldn't help but notice another unique runner: Likely in his 70's, maybe 5'1, arms folded at his elbows and not moving, and ran with a waddle. I was about 50 at the time, and that SOB passed me around mile 20. A year or 2 later when I ran that marathon again, by mile 22 I was struggling, genuinely thinking about quitting. You guessed it, that same now-older SOB passed me again. Somehow, that motivated me to get to the finish line, although he left me in the dust.