[Automatically, he opens his mouth to answer, to tell her about it -- but when she corrects himself, he realises his mistake. Of course it wouldn't be a concern of hers, now, why should she ask about it?]
Nah, I'm the one who's sorry. That has nothin' to do with this, I shouldn't have mentioned it at all.
[He coughs lightly, pausing as he has no idea what to say at all. He only knew he couldn't let her go, couldn't not talk to her... but now that he's supposed to be saying something about what happened, the words are refusing to come to him.]
Look, about what happened- [There's a pause as he searches for the words, again - a pause for Elsa to interrupt, if she feels so inclined.]