The only reason she's out of breath, she finds, is that trying to remember to breathe when you're too busy laughing is somewhat difficult a task. She steadies herself with the grip she still holds on his shoulders, sliding one hand over her face to clear the water from her eyes.

"I'll - have to give you credit - for that one," she pants, barely managing a laugh while the water ripples and settles around them. The sun's completely disappeared behind the horizon, but everything's still bathed in a rosy glow, and her gaze finds Castle's in the dimmer light.