This discussion highlights the need to protect your head and your legs. In the British Midlands Knebworth crash a number of passengers suffered fractures to their lower legs (tibias) and having survived the impact were immobilised and unable to get out. Seats were redesigned and crash survival breifings modified. In that crash there were a number of servicemen returning from Northern Ireland and their survival rates were better than average. It is presumed that they had a better understanding of the brace position. Both feet firmly on the floor to prevent their swinging forward to impact on the furniture in front.