Night Terrors

Caleb's night terrors are back and they have been really bad lately. He is now sleep walking/running. Tonight he woke up and ran to where I was. He was in a cold sweat, shaking, and screaming, "I saw it. I saw you. I saw it. I want it." I asked him what, and he was pointing to a wall. He then started running all over the house, room to room screaming and pointing. It is totally crazy. I finally got him to lay back down and he is now quiet. I would love to know what he is dreaming about. I would also love to know why he get these! It may sound weird, but I miss the nights of just night terrors without the sleep walking. When you add sleep walking to the equation it is scary, just from a safety stand point.