I played a Scriabin Etude last night in school concert, (C# minor) very 1st one. I learnt it on the day of the concert, arrived, found out I was playing on an electric piano

then went on stage, started playing in front of all the people, and it was in B minor, i was very confused, and kept playing, with my eyes glued to the score as I was totally out in terms of pitch, i just couldn;t hear it at all and kept trying to correct myself. Stood up at end, and realised that some idiot had left the trnspose button on and put it a tone flat!!!
Total disaster, luckily only one person had perfect pitch in the audience, but it was still a disaster, Scriabin etude in C#/ B minor. haha, bet he was turning in his grave