Surprised, and disbelieving in a way that doesn't seem skeptical, which is important, and he can't help but like being capable of surprising Bruce Wayne in ways he chooses. Clark swallows in the wake of the barely-felt tag to his throat, backing up a step himself. His hand chases the touch without really thinking about, banishing the lingering tickle of it with the flat of his palm.

Smiles, a little, says, "And winning."

It's very possible that he has flustered himself in the wake of open silence, because playing it off isn't supereffective. But okay about it, really, no walls within him to shift into place.