OK...
listen to this story of Glen Gould....
He walks into the stage to play the Goldberg variations, sits down. And plays the first notes completely wrong, I mean horribly out of place.
He stops bewildered and takes a deep breath. He starts again, lifts his hands and plays the 2 notes that begin the variations on a piano dynamic. Once again completely wrong.
Third time he tries it, he plays the same 2 notes wrong.... his face is that of a guy who thinks the piano is somehow wrong, and that he is playing the right note.
He gets up enraged yelling all kinds of swera words !"#"#R&#$&$%/$%/&!!!, etc. He lifts the piano bench and throws it back stage. He walks of the stage and you hear him yell, demanding the score.... silence for some minutes, then he yells AHA!!!
He walks back on stage and plays the two notes, now correctly still standing up in a FFFF dinamic, and then continues playing and finishes the variations flawlessly....
is this grotesque behavior or what???