I had just departed a famous airport and proceeded on course.
Tower: Cessna XYZ, what is your heading?
Cessna XYZ: XYZ heading Southwest.
Tower: Cessna XYZ, what is your heading?
Cessna XYZ: XYZ heading Southwest.
Tower (agitated): Cessna XYZ, I need to know your heading
Cessna XYZ: XYZ heading Southwest.
Tower (very agitated): Cessna XYZ, fly heading 225 degrees
Joe Serdynski