Negligence – Causation. The Queen's Bench Division held in determining liability for a riding accident in which the claimant had been seriously injured, that the defendant had made a serious error of judgment in acquiring an unsuitable horse at the early stages of her riding hobby. That informed both the standard and scope of her duty of care. By positively encouraging the claimant to ride the horse, and condoning if not specifically instructing a trot in an open field for the first time, she had exposed the claimant to a risk of injury from a horse which could not be controlled in other than the most benign of conditions.