[That smile makes Steve give a small awkward smile in response. He's not sure if levity is appropriate, but it's Bruce, and someone who understands the whole Avengers thing and isn't Tony is extremely nice to have around.]

I haven't seen him since I've been around and hiding doesn't seem to be his style.

Ms. Potts and Mr. Stark are here. [Note who gets named first.] You might know a few that I don't, there seem to be a lot of people who speak your language around here. [Guess who looks slightly embarrassed that he doesn't speak Science?]