"Yeah, I ran into him already." Which was only a little awkward, but much less awkward than when he bumped into Black Widow. "Also the scary lady's here." He doesn't need to explain who that is, does he?

"Uh huh." That's his 'is that voice that kind of sort of but not really but maybe so a threat?' response. "Man, we're on the same side!" You know, work together. Teamwork. Good things!