"Is that so." More wry than shuttered, this time. Implying he isn't trying to get one up on Clark, perhaps-- no matter that he always seems to be. Though that seems-to-be is with everyone; a compulsion, defense mechanism, way of life he doesn't know how to turn off.

He could change the subject, here. He should. This is dangerous - more dangerous than trying to punch each other's lights out. Bruce knows by now that the only plans to stop Superman must hinge on Clark flinching, and this is - something. They're both unsteady, and he isn't sure why. (Well, he knows why he's unsteady, but can't imagine it's the same for Clark.)

"When you were traveling, where was the weirdest place you came across?" A beat. "Besides Gotham, which I noticed you avoided."

Of course Bruce knows about that. Either from his standard batcreeping or because of Martha.