I have always worried about how I could tell my location in the middle of a forest if I needed emergency asistance. Quite often I’m in paths with no name, or even paths not mapped by Google. A friend of mine gave me the answer: the Finnish 112 app, available for Android, iPhone and Windows Mobile. When you make an emergency call with the app, the emergency services automatically get your location. You can also specify your spoken language, english among them. You can read instructions in english here.
Fortunatelly, I haven’t tried it and I hope I don’t ever have to.