Clark looks genuinely pleased before the thing he'd been thinking about earlier slipped back into the forefront of his mind. It's visible, but he rallies.

"I might even have a pair of steel toes in my things. I did a lot of odd jobs traveling and while I didn't have to worry about it myself, the foremen at a couple of them wouldn't let you on the site for insurance reasons. If you don't mind wearing a couple of pairs of socks for tomorrow."