A friend of mine was driving back from a folk evening when the car in front of him made an emergency stop. My friend was observing a safe stopping distance and manage to pull up safely, only to be rear-ended by the car behind him. The police breath-tested him and the driver who had crashed into him and my friend was one or two percent over the limit. To his utter disbelief, he was not only charged with this, but also blamed for the accident and had to face a careless driving charge as well. The police never claimed that the circumstances were anything but what he claimed, but the court held that in his state he must take the blame. It still seems very unfair that after stopping perfectly in an emergency he should be penalised, while a sober driver (who presumeably drove like that all the while) should be let off the hook just because he was lucky enough to hit somebody who was over the limit.