Some hypotheticals:

You fall on your knife, tearing a 3" gash in your thigh. You are two miles away from your vehicle. Your cell phone has no signal. You are bleeding badly and are starting to get light-headed.

Same scenario, except you have just fired your 30.06 hunting rifle into your calf after dropping it crossing a fence, hitting the bone. (yea-it could never happen to you, except it has, and now you have to get your ass out of this nightmare and survive.)

You are alone in both cases. How do you seal up the wounds long enough to get out?