Sorry AP, don't understand your banter.
On the original question, if you teach enough students spinning then you will see most mistakes! In the Bulldog just a small amount of inadvertent aileron input can get the rotational rate up quite nicely, and separately the aircraft will go high rotational if the stick is not held back against the stops. On the latter the FI follows through to ensure that the stick is brought fully back (and kept back), unless deliberately demonstrating the hi-rot spin in which case we start 3000' higher.
The Extra is rarer for studes to mess up the spin recovery as the large control surfaces ensure a pretty rapid and predictable reaction. Most common error is being slow to centralise the rudders after the spin has stopped, in which case the aircraft usually spins immediately in the opposite direction, often turning an academic exercise into a genuine "whoops I need to recover from an inadvertent spin!"
I've rarely had students freeze in erect spins, but forgetting what to do in inverted spins is not that unusual.
As with teaching Unusual Position recovery, some studes are initially slow to get the sequence of events right, but most get it right within a few sorties. One chap I flew with last year was unusual in that he could recite everything about the recovery word perfect in S+L flight, only to turn to jelly as soon as the horizon moved somewhere unusual..