He likes to throw all his bedding off his bed and roll his head and upper body up and down the bed. (Not sure how well I'm explaining this).
My parents have a long draft excluder which he'll move into the middle of the room and do the same thing on the floor. He can do it for ages, usually needs to be distracted for him to stop.
Anyway a friend has recently witnessed it and has expressed concern, apparently it's not normal?
Any experience or thoughts?