Pianist Yuja Wang is renowned for her digital dexterity, for the speed at which her fingers appear to fly up and down the keyboard. But the San Francisco Symphony noticed something else that Yuja Wang does very, very quickly: bowing. In the video below, the SFS, led in their physical exertion by Michael Tilson Thomas, pay handsome tribute to their star-soloist's distinctive salutation, and pull off what is surely the speediest massed bow you will ever see...