So basically you are saying that he fell over before Miller even "hit" him, which makes it worse because he was already falling thus any contact would not result in him falling.He steps on the ball, his boot slides off the ball and lands on the ground. He doesn't lose his footing because of it but he gets somewhat crossed up and the ball bobbles right after his striking leg has gone back. He simply could not adjust to cater for the bobbling ball and lost balanced while trying to do so.