It's a look Aleifr knows very well, and it makes Aleifr pause.

It's the unblinking gaze of a wolf across the ice, weighing the object of it's attention as a potential threat, and it's not something you see in the eyes of most people.

The man had struck him as hardened and capable at least, and very, very dangerous at most when they'd met in the cafeteria. Right now, the pendulum's swung very decisively towards the latter.

So Aleifr stops and meets the man's eyes.

"Can't sleep?"

His voice is casual. A touch tenser than conversational, but the man will find the same, unblinking intensity in Aleifr's eyes.