Hi P.,
My advice, don't freak out! This is very "normal" for kids to have this kind of gift. Some are more gifted than others. It's all an individualist type ability. My kids had this and still occasionly do. I am very energetically in tune and somewhat intuitive about things, although the more I practice the more I can intutively assess many of my own situations. I have for others (friends) who request my help.
You should google the term "indigo children" and read up on it. It is very possible your child is an indigo child. Depending on your comfort zone and your religious beliefs you may want to encourage his talent or gift.
Think of it this way, if your son isn't frightened by it, there is nothing to fear. My beloved spiritual teacher taught me, that when it comes to any entities of the other side trying to get someone's attention, "Those in light will answer and bring peace, those in darkness run, when confronted." Ask your son more questions. My children have been with me or my husband and my parents and have either pointed out people no one else could see, or have "predicted" an event that was hours or days away that would come to pass. I did the same thing as a child and my abilities have become stronger with better health and weaker if I have a health issue. It also has to do with how "open" we are. There are theroies that children remain so open becaue #1 they are closer to having just come from the other-side, and #2 no one else has programmed them to disbelieve in where we all came from and so they are closely connected yet.
There are so many different belief systems out there, I happen to be Christian, and began to look to the gnostic gospels as well, which are the early teachings of Christ. I respect the Buddhists and all other forms of teachings that stick to the ideas of Light & Learning, they all have so much to offer.
If you care to email me privately, I can give you tons of information and resources on all this. I have been studying spirtuality for 15 plus years now and I love to share anything that may be of help to another. It's such a wonderful gift with so many advantages to any one person as they work their way through life.
Please, keep us updated!
Love & Light to you and yours!
D.