Could it be an advertising teaser campaign for running shoes? Nike or Adidas or someone. Perhaps something along the lines of "Get there first with .... Our shoes are so good that not only will they get you to your destination before the crowd but they'll even get there before the rest of you"

There will probably be a TV campaign with group of athletes with a different sort of shoe on the other foot.

My other thought was that my son grew an extra foot between the time he was 12 and 16. Could it perhaps be nature's way of getting rid of them?