Dr. Cox: But, still, I'm starting to think it would be smart if you and I were to bury the hatchet. What do you say, there, Bob?... Come, on, handsome!
Dr. Kelso: Listen up, ace: You will always be a royal pain in my ass, and I will always be waiting for the day when I get to jam that knife into your side once and for all; and you know it as well as I do!
Dr. Cox straightens Kelso's nose.
Dr. Kelso: Much better, thanks!
Dr. Cox: You're welcome.
Dr. Kelso: People don't change, Perry.