J.D.: Dr. Cox, can Sam watch West Side Story? It helps him fall asleep.
J.D.: [v.o.] And it makes my heart sing.
Dr. Cox: Fine, but absolutely no singing or dancing along. And I will throw my coffee at you if I catch you even once doing this... [snaps]
J.D.: [v.o.] All right, I'll just do it in my head, then.