Gun shots, dog mauling, compound fractures, partially severed limbs... Sometimes direct pressure isn't enough to cut the blood loss. This U.S. Army field instructional is a fascinating and thorough medic's walkthrough. Learn exactly how to apply a lifesaving tourniquet to an injured limb. No first aid poster can compete with the unmistakable deadpan of a military issue instructional. Only the American Army could deliver such eyewitness first aid advice. Bookmark this. If you're ever stuck between a rock and a hard place (literally), don't WebMD your survival plan. Go right here.