Two instances in two days - cannot be coincidence! Lining up at a busy Blockbuster, one person on the register at 5 pm on a Sunday evening! Other employee wandering around with lost look on her face, observes line up of at least 10 people - "Shall I go empty the drop off box before I leave?"
Then says "I wonder who is due in on evenong shift tonight?"
Colleague responds (amazingly politely) - "While you wonder aobut that perhaps you could serve a few customers!" - definitely management material (for Starbucks!).