There's hesitation on Carlisle's end. He can tell Glacius anything, he reminds himself. The alien is his most trusted friend in the city... especially now that Chris and Miriam are gone. The former would have reassured him that there are plenty of things to be afraid of, but this illusion is likely not one of them; the latter would have told him he was fun, but would be more fun if he tried new things every once in a while.

And what would Glacius tell him? He's sure he already knows, given that tone in the icy giant's voice, and the way he's taken to the changes in the city, exploring them while he has the chance. Carlisle hasn't that kind of bravery on his own, and he knows it.

"I, er. Of course I'll go back afterwards," he reassures through the communicator, though after what, he's not sure yet. "I'm just, um."

Trying not to panic. Attempting to cobble his nerves into something that even vaguely resembles a working human being. Wondering if it'd be less embarrassing if he called Kate to come pick him up.

The answer to that last one is a resounding no. "Just taking a break. The stairs do wear me out."