Whirlybird is, unsurprisingly, right on the money.
Reminds me of the lesson I had with an optimistic instructor in Spain, who filed for for a two hour lesson...
After about 1h30 of intense tuition, I was in a descent aiming for 75 knots, and it was getting more rapid. "Pull back!", says the instructor. I am! Airspeed nudges 100 knots. "Pull back!", he says more urgently. But I am! What the hell is wrong... airspeed is approaching 110 knots, I'm pulling back...
"OK, you're confused, we go home, I have control..." as he pulls the yoke back from the forwards position I was pushing it into.
That was quite a shock, and I learned something rather valuable about myself. I think every student should be taken on a 2-hour lesson until their brain fails, just once.