Last Saturday I was coming back from DC and had a layover in Atlanta. I had to switch terminals so I went downstairs to take the tram and saw this. (You may have to click on the image to see)
This guy ran right by, running clothes and running shoes, and I couldn't get my phone out fast enough to take a better picture. Not a bad idea considering the tunnels between terminals are almost a mile in length and the Admirals Club/Sky Lounge or whatever usually have showers.