sense of duty

Staff member is stopped just outside the college door by a young man:

"Excuse me, I wonder if you can help me..."

staff: "Where is your Student ID?"

man: "My..? Err..?"

staff: "Have you paid your course fees?"

man: "What? Err, yes?"

staff: "Good man!" (walks off)

Man turns around to another staff member: "Right!? Err. Can YOU tell me where the tube station is?"