The person occasionally glances back at the dog. Because of these nervous looks, it could be construed that the animal is following this solitary human, unbid. Or the dog is passively walking, its walk happens to be behind the lone figure, they have, by chance, fallen into co-existing step, like a pair of clocks back-to-back in adjoining rooms. (Such clocks have been noted to synchronise, one slowing down and the other speeding up until both pendulums swing with the same (though opposite) tra...
