Scene from Dr. Mister Cute Wheelchair Man's office:
Student: Dr. Guest! Dr. Guest! You gave me an F!
(Note: many of them insist on calling me Dr.; I've given up on correcting them. Also, imagine thick sludge of Southern: my last name becomes two syllables; 'F' sounds something like 'ayy-eff'.)
Me: I know!
Student: I didn't think you'd give me an F, Dr. Guest!
Me: What did I say I'd give you?
Student: An F!
Me: Well, there you go.