The local conductor of a Canadian orchestra gets on the podium to start a choir rehearsal, begins rattling off instructions in German. We're a semi-professional choir used to singing in German so we manage to keep up for awhile, but some of us are getting in over our heads.
The conductor begins to notice puzzled expressions, stops the rehearsal, looks around, then:
Conductor (in German): Ist... (pauses, looks uncertain)
Conductor (in English): Errr...what country am I in?
Apparently he'd been on a worldwide conducting and performing tour and was so exhausted he literally had no idea where he was.