Hi Libbie,

I remember years ago my little brother who was then a baby started to do the same thing. He did this on a regular basis. After taking back and forth to the doctors my parents were told that he was having night terrors, they were told not to wake him and to just comfort him if possible and let him just go back into a normal sleep. My brother used to throw himself around screaming his heart out but he was still asleep, the Dr's told them to just leave him on the bed and let him go.... It's a scary thing to watch I know but there really isn't anything you can do for him. Maybe opinions and treatment have since changed, take him to your GP of Early Childhood Nurse and see what they have to say.
HTH

Take care
Trish