He notices the way the other's hand moves from his weapon. He wasn't concerned to begin with, since there hadn't been any real desire to use that weapon in the first place. Something about what he says is interesting, though.

He gives the man a curious look. He was stabbed, and the way he talked made it sound like he might have died. Did he revive from the dead, or just recover somehow? Either way, if someone stabbed him and they knew to take the clocks (or whatever that is inside everyone here--he never confirmed with the door--but that's what it sounds like), it's hard to imagine they wouldn't have. It's obvious that right now he's alive, though, and presumably that means the supposed key functioning as a poor excuse for a heart is still ticking away inside him. "You still have a clock?"