Music Track - The Wrong Piece!

I found this clip the other day.  I don't know the pianist, but there she was about to play a Mozart concerto when the orchestra began playing one completely different.  She is not happy and has to have some words with the conductor while she sits bemused.  Watch the clip to see what happens. http://blogs.telegraph.co.uk/news/damianthompson/100243153/pianist-maria-joao-pires-panics-as-she-realises-the-orchestra-has-started-the-wrong-concerto/