[Hiro is not-so-subtly halfway to his feet when Callaghan turns back from the door. He'd thought, for a second there, he'd have to chase the man out into the street - and he absolutely would've done it. That he doesn't have to shocks and humbles him enough that he thunks back down onto the stool without a word, his mouth open but struggling to form words.

A friendly reminder that he still can't ever predict what Callaghan's going to do next.]

It...h-he...

[He fumbles over words, and at first he can only nod and acknowledge, yes, fade is probably as accurate a description as anything else he could come up with. He didn't think he'd get the chance to explain so soon; consequently, he's not prepared to do so, and it all just sort of tumbles out in a rush.]

...Mornings, and late afternoons, almost never at night. The first time, it happened while we were out flying with Baymax, but I don't think that caused it because sometimes it just happens when everything's calm and normal. And it's happening more and more frequently.

He gets...warm. Burning up. Not like a fever, but like a space heater. And parts of him start to disappear, like see-through, like you could reach right through him - which I'm not planning on trying, by the way.