A predecessor at a regional flying school was checking a bloke, in a C172, who was uncurrent and had only ever flown PA28s.
Shortish final, approaching overhead the main highway into town and getting somewhat low, instructor tells bloggs "more power".
Bloggs, somewhat maxed out, failes to respond.
Instructor, "MORE POWER".
Bloggs - NO response.
Instructor, by now with high stress level as he has visions of taking out the top of the next pantech which passes, shouts "MORE POWER"!!!!!!!
Bloggs responds this time, bending the throttle almost 90 degrees to inst panel trying to increase power in an arc a la Piper rather than pushing straight in a la Cessna.
Instructor: frantic re bending of throttle & "taking over!!"
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ChickenTrainer