A common scenario we hear about is the lost hunter. They get so focused on following their quarry, that they fail to pay attention to their surroundings and end up lost. Ditto the firewood gatherer, washroom seeker, photographer......

I'd argue that the same thing could happen pretty easily to someone responding to a child. "Hey mom, come see this!" or the sound of your child in distress in the distance, could turn into an unexpected ramble away from camp, and that could easily end up with someone becoming seperated from their pack.