[ ... yes, that really is happening. toothless takes this opportunity to stop his approach, staring quizzically at his arm that had just touched the newly expanding ice. "possible hallucination" is basically thrown out the window, and now hiccup is really wondering about what he's seeing.

can he attribute her nervousness to almost being on the bad end of a plasma blast? who knows. but he snaps back into attention with her question, though he's very obviously showing his mind is elsewhere. ]

Uh, yeah. Yes. You're safe. He's just... curious. [ at that comment toothless looks up, giving elsa a curious tilt of the head. ] So, you don't need to worry about him. Sorry--if he's making you nervous, I mean.