Lance offers a smile of his own in return, both because he's pleased Carlisle can not only read between the lines but actually answered, and also because he wants to reassure him. Sure, throwing things isn't the best way of handling one's anger, but if it's your own stuff and you're not aiming at someone it could also be a lot worse.

It also seems Carlisle pays attention, considering the question he asks in return, and Lance is a little surprised but nods in response. "I am, yes, although not a medical doctor. I'm a psychologist, so I help people with mental or emotional problems."