Nobody said it wouldn't hurt like hell, but generally speaking - you take your shop towels and a wrench and some duct tape - BAM! You got a splint. Bleeding profusely? Take your shop towels, grab a wrench and some duct tape, BAM! You got a tourniquet. Accidently cut your arm off in your shop and the tourniquet can't stop the bleeding? Grab your shop towels, your duct tape, and a blow torch, and cauterize the wound! BAM! Stopped the bleeding - don't forget to cover the injury with the towels and tape it down. Granted, the doctors may be a bit ...... off afterwards, but what the hell? You might have saved your own life.
Plus... better you still be alive than dead when you DO make it to the hospital.
DO NOT TRY THIS AT HOME! ONLY RESORT TO THESE MEASURES IF NOTHING ELSE SEEMS TO WORK! IE - YOU LIVE IN THE MIDDLE OF NOWHERE - AND THE ONLY HOPE TO SAVE YOUR LIFE IS AN AIR LIFT!