Nurse: Doctor Bob - the patient is sinking.
Doctor: I wonder what he is sinking about.
Very poor. Later on, I seem to think there's another gag.
Nurse: Doctor. We've lost the patient.
Doctor: No. He's just here, under the sheet.
Totally harmless. Very sweet.
I guess I'm thinking of it at the moment as my mood sinks down from the highs of a damned good trip away from... erm... all of... this.