[His stomach actually hurts from laughing, and it takes him a moment or two before he can compose himself enough to reply.]

It means that you're a goddamn idiot.

[He exhales heavily, the last of the laughter dying away and his usual neutral expression returning.]

You know how many people would treat me after I attacked them? Or who would keep following up on that? Or who would prescribe sedatives to a dangerous and cagey guy who wouldn't give a real name? Or who would agree to perform awake surgery just to make me feel more comfortable? And you're feeling guilty because I had to wait?

[He shrugs. He's not embarrassed by affection or appreciation, just not good at expressing it usually.]

You saved my life, and that's why you're a punk for worrying over something so stupid.