For a split second, there is what can be best described as Schroedinger's Daisy. She could either laugh, or lunge. The end result? A sharp quirk at the corner of her mouth that could be an amused smirk, but is rather undermined by her deliberately shifting like she's going to come at him.

Look she's behaving but if she's not acting a little threatening when sufficiently pushed, is it really her?