I was playing Scarbo from Gaspard de la nuit, composed by my hero, Maurice Ravel. When it was first played by Ricardo Viñes (Ravel couln't play Scarbo part after he composed it since he thought its difficulty was above his skill as a pianist), some deeply appreciate the originality of the piece while some harshly criticized its almost insolent novelty excessively violating classical standard. It is depressingly hard, but I like the thrill.