I had this predicament a while back after dropping a fare about 5km outside the city at about 2am in the morning, when the fare was completed there was an animal in the road about 15 meters ahead of me that had been struck by a car, the animal was still alive and convulsing and rolling over turbulently on the road with blood and guts hanging out, it was so badly injured that I could not tell if it was a small fox or a big cat, but it was in terrible agony, and no way was any Vet ever going to put this creature back together.
My predicament whilst alone on the rural road was whether to roll over it's head and put it out of it's misery OR drive away and leave it to die a slow painful death ?