Christchurch Boys' High School students are about to get a sobering lesson.
George Cairney's life was completely changed in 2008 when he sat in the passenger's seat of a car beside a driver who had been drinking. The car crashed into a brick wall at 135km/h.
He will talk about the crash to students at the high school's hall on October 18 from 7pm.
At the time Cairney, 24, was 17 and attended King's College in Auckland.
Taking most of the impact of the crash, he is now legally blind and has lost his sense of taste, hearing and smell, as well as developing diabetes, epilepsy and premature ageing.