This video reminded me of the Benjamin Zander’s speech about one buttock playing.
When I first watched this video 2 or 3 years ago, I didn’t understand what playing on one buttock meant. I thought it might have been a deep philosophical reference to a certain leadership technique. Only now do I understand what he meant. Living on the edge or playing the piano on one buttock can be taken quite literally as in being always slightly uncomfortable, because that is as close to comfort as you will ever get.