We all know how tourniquets work. You take off your tie and make a big fat knot just about where your friend’s bloody stump is squirting buckets of blood, thereby saving him long enough so he can tell you “who did this to [him]! Who did this to [him]!”
Well, since the military doesn’t wear ties, they’ve created the CAT, an improved tourniquet with a shorter learning curve and a cooler design. It uses a “windlass” to tighten the cable and can be operated with one hand, thereby allowing soldiers to do their own body work if necessary.