Damn all of you. Jay, thank you for saving the stupid dog.
We [human kind] have spent 30,000 years forcibly breeding dogs into the shapes we prefer. We could let the obviously deranged breeds go, but instead people buy them from [in]breeders, and guarantee that the world will be filled with their twice-as-deranged offspring.
I know it doesn't seem like it when you breed mopeds and not dogs then suddenly have to choose between laying down in the road for a while and hitting an animal, but they're your dogs too. They don't get to choose; they're animals, and don't know that chasing cars is bad for them until they've been killed by one.
Ultimately, they're as much a part of a human city as the roads you're riding on.
So, shame on everyone who seriously suggested that Jay should have hit the dog. Yes, sometimes there isn't time to decide, or room to maneuver. This time, in hindsight at least, there was; I just wish it hadn't ended in a crash.