I had a similar experience with my nephew about 5 years ago when he was 18 or 19. We carry our cells and always touch base when we are on the ground usually through a text message.

On this particular event, his battery was goind dead and he was trying to call me and whisper he had deer around him and he would wait until the deer left (he was hunting a transition area from bedding to an alfala field) before coming down. But after about three attempts his phone went completely dead.

I thought the worse, envisioning him having fallen climbing down, and drove like a madman to where he was. Needless to say I was relieved to find out it was only a dead battery.