11. Keep your mouth open and breathe in small intervals. The most lethal aspect in an explosion is not shrapnel or heat, it is the blast overpressure. The blast wave travels at supersonic velocity and severely affects the air-filled organs like lungs, kidneys, and bowels. We naturally tend to take a deep breath and hold it in emergencies. However, this proves lethal in a bombing situation, since our lungs become like a pressurised balloon to be ruptured by the blast wave. The majority of victims in a typical suicide bombing die from internal bleeding in the lungs. Only 6% on average die from shrapnel wounds. Your chances of injury with empty lungs are far smaller compared to holding your breath.