Take a hydrogen bomb. The instant after the atom is split, what happens? I always imagined it as the protons and neutrons stay in tact, but the separation of their strong force bonds releases a bunch of energy in the form of EM radiation. But how does a bunch of EM radiation cause such huge shock waves and damage? Or in TNT, there is a chemical reaction and the through conservation of energy, a lot of EM radiation is produced. What is actually doing the damage to your body if you are near an explosion?