Here is a group of people running. They're wearing numbers so I guess they're supposed to be in a race. The guy on the right is passing the time by imagining that he is a Secret Service agent assigned to protect that woman in the middle, who is the President of the United States. "Looking good, Madam President!" he says to her, in his imagination. "Almost there!" But even when he's talking to her, he is scanning the area for potential threats. It's second nature, because of his Secret Service training.

The man on the left is also imagining that he is a Secret Service agent. But in his imagination, he's not on duty. Today is his day off and he's just running. He isn't even carrying his gun or anything.

These men will never know of their shared penchant for daydreaming about silly things while they run, because, while they are old friends, they never really open up to each other.

Happy Global Running Day.