George's patient claims to have eaten 8 marbles. He spits up several of them, but Dr Bailey still removes 8 marbles from his intestines during surgery.
When Izzie is trying to convince Harriet to get out of bed, her headband disappears from her hair between shots.
When George's patient returns to the clinic claiming to have eaten 8 more marbles, they fall through his armpit and not his mouth as he bends over to regurgitate them.