First impression or second look?

To Old Upper Thomson Road, 25 km. I don't feel like training today, but if I don't, I might not have time to train later this week, since my time is not mine. A smile flits over my face as I hit 47 km/h but other than that, the workout is hard work. As I rush along the winding, uneven road, I see a dark patch. At a glance, it looks like a dog slinking along the road; perhaps it's the one that's been barking at me. I take a second look, but there's no dog in sight. Moral of the story: after forming the first impression, take a second look.