I've seen in two movies a foam you can inject into your wound to prevent internal bleeding. It seemed amazing and a great thing to have in a fak for any outdoor activities or even everyday depending on your work. What you do is inject the foam into the wound and it expands and helps with bleeding give you a 72% chance of survival compared to an 8% from what I read. I can post some links later it's being worked on by one of the darpa contracts. Love to hear some opinions on it. Sent from my Android toothbrush!