Read to the end and you will see... C-4 is classified as a high-order explosive (HE), that produces an over-pressurization shock wave.  It is similar to TNT, Semtex, nitroglycerin, dynamite, and ammonium nitrate fuel oil (ANFO). It is very stable and cannot be detonated by a gunshot or by dropping it (unlike the explosive TATP, commonly referred... Continue Reading →