Tossin' and Turnin' all night

I put Micah to bed in the exact same position every night. Generally when Scott or I check on him before we go to bed, though he is asleep, he has scooted his way down to the foot of the bed. When Scott or I get him up in the morning, he has scooted himself all the way to the head of the bed, and sometimes upside down (like in the photo). He sleeps through the night just fine (which I am VERY thankful for), he just tosses and turns the whole time!! One time Scott was checking in on him, and Micah was lying on his side, then he threw himself on his back again, then rolled on his side, plopped on his back again...and this whole time he was asleep!