If I am running without shoes on, it is generally termed bare foot. I am quite sure I am aware I do not have shoes on.
Okay, sarcasm aside. But seriously this is a question that is regularly posed to me. So to the runners out there perusing this blog who wear shoes.. yes we know we are barefoot!
However I think the question is more an affirmation to the questioner that their eyes are not playing an optical illusion on them.
The best reaction is from cyclists who pass you, pointing at your feet, their jaws wide open..
Drivers in cars – especially the athletic looking driver who will slow down to double check his eyes are not playing games on him..