Blast injury
High-order explosives (HE) detonation causes the explosive material to change into a highly pressurized gas which travels at supersonic speeds creating a 'blast wave' (over-pressurization shock wave).  Examples of HE include TNT, C-4, Semtex, nitroglycerin, dynamite, and ammonium nitrate fuel oil (ANFO). Supersonic is when something travels at speeds that are faster than the speed of sound. The speed of sound is about 768 miles per hour (1,236 kilometers per hour) at sea level.