He looks entirely too smug about the prowess of his not very smooth at all moves for the few seconds it takes before she's launching herself upwards, somehow. Launching him, too, and then grabbing hold like he'd just dangled her over the ledge of a Coruscant walkway.
There's a moment, a few breaths, where he just looks down at her in confusion before easing her feet back to the floor.
"What was that?" Not that he couldn't guess--the Force. Of course it is. Can't break the tradition that carries on of every time Han is absent against his will, one of the two ends up learning some powerful tricks.