This is much harder even than it looks
I am practicing the beginning of this cello solo piece, written by Bach. It looks hard when Rostropovich plays it. Believe me, it is way, way harder even than it looks. Your left hand is jumping around like crazy hitting all the notes. I can play it much much slower than it is supposed to be played. Speeding it up will take the rest of my life, if I ever get there. Rostropovich is an elderly guy, and you can tell he has been playing cello like a madman all his life to get to this level.