I've always imagined the "I broke an ankle scenario" where I'm basically sitting waiting for someone to find me. Thus the whistle, bright "flag", and some kind of bright light. This actually almost happened to me. I decided to walk around the edges of the flooded farm field next to my property. I got almost exactly on opposite side of the flooded area from my house, and my leg dropped almost to my hip in mud. I truly struggled to get out. I could actually see my house in the distance, but stupid me didn't tell my wife where I was going, nor did I bring a phone - just a gps and a camera.