We have a neighbor we call "Dog Man." Every day, several times a day, he takes his dog out for a short jog. They always go at the same pace, cross the street at the same point in the middle, walk down another street just to one exact point (not the end of the block) then turn around and do it in reverse. Just a moment after he disappears down his street (a cul-de-sac perpendicular to ours, which is why we see all of this) he then drives down the street with his dog in the car, goes around the block and comes back. Occasionally the order is reveresed, but it happens at least two or three times a day.