[The word frosty definitively makes him raise his eyebrows, but he doesn't comment on it. Teacher Jackson shouldn't have any reasons to pick on that word after all.]

Of course they are good kids, I know that better than anyone. Cops have this bad habit of thinking of them as potential pranksters though.

[So yeah, he's gonna presume all that and more, thank you very much. Or at least, he'll do so in his mind, because it seems he needs to stop his mouth a bit more. If Hiccup thinks things are frosty between them, then Jack's bitterness is slipping into his words and can't allow that. It'd put his cover in danger.

He rests his chin on his hand, leaning forward to try to come off as more relaxed and carefree. He's itching to take off his shoes, but he knows that as soon as they are off he would start going all monkey on the chair, and it's not a good idea to show off how flexible he is.]

We met today, detective, I didn't know there already was a "between us".