That definitely has an effect. A positive one... more or less.

(Tony looks very like Sherlock right now. Standing straight, chin up, face calm—perhaps the word is: uncompromising.)

"Yeah?" he repeats, softer now. Thoughtful. The tight anxious feeling, the hollow growing in his chest, hasn't gone away, but he's not really scared. Just nervous. And he's starting to let himself think about why.