"Whoa, careful." he says, letting her latch on to him. It's not so much that his balance works under water and more that he can still stand where they are, though the wave does carry him back a bit closer to shore.

"You gotta watch the current-even the most accomplished swimmer can get taken out by one that's strong enough." But if there were any real danger here is Spidey sense would go off. At least, he thinks it would.

"Can you do a handstand?" He changes the subject.