Worse, the audience's misplaced generosity can do unwitting damage to the young performers themselves: they emerge post-show feeling thoroughly rewarded for a performance that the creative team then has to delicately unpick to improve on its faults and failures.
It's the most unusual performance that the generally laid-back Mr. Auteuil has ever given.
But it's more than performance that the dance film hails; it commends and applauds play.
It is through the communal act of performance that the music's secrets can best be sensed.
It was clear at the first performance that the young audience were primed for this standoff.
There was a touch of the showman about the performance that the Gipper would have recognised.
"But the management has never been able to get at the financial performance that the technical position deserves".
It was the sort of performance that the Jets want of Pennington: controlled and managing the offense with precision.
It had everything to do with Sidibe's performance that the film became the sleeper hit of 2010.
"It's hard to take, and it's a measure of the performance that the players are genuinely disappointed," Hurst said.
So potent was the performance that the audience burst into rousing applause during a momentary lull before the ending.
