Experienced people have tremendous skills to impart, but so do novices. Bev Thomas was working on a boat on the Great Barrier Reef when two crewmates began a 20-minute dive. Hours later, with rescue helicopters circling, there was still no sign of them. They were experienced, highly skilled and knew the area well, but, as Thomas reflects, these factors led them into a life-threatening scenario. Here, she reveals how this incident changed her outlook on life and work.