Is it common for teenagers to have encounters with ghosts?

Story told by a student and corroborated by both parents: " My father and I were playing basketball in our driveway one afternoon, and we hear a baby crying. There's no houses around us, just woods, so we stopped playing because we thought a car had stopped out on the road. Suddenly, a woman walked out from along side our garage and started yelling at us to keep quiet, that we were waking the baby. This was very strange, because the side of the garage is built into the side of the hill, so there's on way of walking there. My father and I were startled, and then I noticed that the woman didn't seem to have anything below her waist, no legs. We both screamed and the woman disappeared. We ran into the house and told my mother who didn't believe us. She said she would pour salt on the door sills and window sills to keep the ghosts out. Two weeks later, w my dad and mom and my brother and I were in driveway, talking, and the whole thing started over -- the baby crying and the woman walked out from along side the garage, we all yelled, and the woman disappeared. We went to out church and talked to the pastor about doing something, but they said they couldn't do anything."

Meeting the parents later, they felt the apparition was a remnant of the nearby immigrant wagon trail that had been there for a quite a while, and were coping with the situation.