That's... a startlingly accurate assessment, judging by the slight lift to Khan's eyebrows. It was impressive - and suspicious.

"And how, exactly, are you aware of my heartbeat?" He steps closer, and it's almost a prowl despite his aforementioned injuries. A human could pick up on his breathing and his pallor, would perhaps be observant enough to notice his ribs, but his heartbeat? No. That was beyond their ability.

And yet, this man has.