Dr. Cox: Look, one of the reasons interns have so much trouble putting in chest tubes is because it is a violent procedure. You must not be scared, though, children. You need to use force to get the tube between the ribs, then pop it through the pleura. What do you say there, Lis? You can do this.
Keith: Uh, Dr. Cox, I'm not so sure I'm comfortable with this.
Dr. Cox: Then you shouldn't have lost my teaching mannequin.
Keith: I don't know what happened to it.
[elsewhere, the mannequin is wearing a custodial uniform in the passenger seat of the Janitor's van:]
Janitor: Hello, carpool lane. [laughs] So, what movie do you want to see?
[reality:]
Lisa: Inserting chest tube.
Keith: Ow! Lisa! God, he was joking!
Dr. Cox: Yes, I was, Lisa. Now take the rest of the afternoon off and think about what you did here today. This is a warning, people. Anybody else who hurts Keith is going to get the exact same treatment as Lisa. Good day.
Elliot: Nothing like watching your boyfriend get humiliated daily.
Gloria: Purple nurple!
Keith: [screaming]