[There are certainly Walter Whites being rude. But this is public so if Will picks up on any strain, he's not about to ask. Best to sound relaxed, comfortable. Welcoming.]

Just keeping an updated list, Doctor Chilton. [Said with something akin to polite respect instead of the exact opposite.] Not too different from what has to be done as a teacher. Something familiar to pass the time with, that's all.

[Sort of like stepping into the fray, whoops.]