Alex (to the interns): Dudes. The patient can see you giggling over here like schoolgirls. Enough wise cracks.
Steve: Cracks! (they all laugh)
Richard (walks up): What's so funny?
Alex: Sir, these idiots were screwing around and I kinda got sucked into it. (they all laugh)
Richard: Enough! Now, if you children need a lesson in professionalism, come and see how it's done.