He puts his hand on Matt's shoulder when it becomes apparent his balance is suffering, letting go the second the gravity comes back. Frank nods, he already told Matt he'd been here months already... but the next part has him balling a fist at his side.

"Thanks for that, by the way. I had to traumatize her with the whole sordid story." He taps Matt to get him moving, voice tight but not angry. He heads to the mess hall with a clipped gait, nudging them into the thronging dinner line and pressing a tray into Matt's hands.