Since he was up here chilling..err..dueling he's just swimfly out of the way of spells. It wasn't very fun dueling with Chloe and he knew intent when casting a spell or charm was everything and since he had no intention to hurt or maim her, this wasn't going to work out with him so he'd do the next best thing--dodge. She could get her practice in while firing shot at him and he'd have some fun dodging them.
It was a win win in his book.
When Chloe shot the petrifying spell at him he floated a bit to the left to dodge it. Whoop!
"Nice shot."