[That stops him and he's taken aback. A month? But... that doesn't make any sense. He rakes a hand over his face, trying to make heads or tails of it.]
I... haven't honestly been out that long have I? [Thinking out loud. If they had him, if this was an experiment? And the way his body recovers...]
[Frowning as a thought occurs to him.] Have you been alone all that time?