Courtesy of Gymi, a remarkable escape for a couple driving on Highway 401 in Canada.
I like to believe that all (or almost all, barring acts of God) accidents are avoidable, if the rider/driver acts correctly and observes correctly. Whether it's your fault or not, you should have seen it coming, or at least the possibility. But I cannot see how anyone could have foreseen this one without 101% forward observation and a healthy dollop of luck. The driver's reaction was pretty instant, too. Lucky, lucky people.
Watch it, and then go and change your underwear.