I must of been in a dodgy 150 then, coz it wouldnt pitch nose down under full power.
I'm fairly sure that the airflow over an elevator on an aircraft in a stalled condition, would be quite different than what is demonstrated in effects of controls 1. unless of course you have an extreemly advaced first lesson.
Also, if you wanna throw in "P" factor and gyroscopic effects on a stalled aircraft, just to liven things up a bit, go right ahead.
I think I did state "this might not be th right procedure, but it works for me".
By the way, I seen the same effect in a 185, 188 and 180hp 172........I gotta stop flying these dodgy craft.