Benjamin Grosvenor is an internationally recognized British pianist with jaw-dropping talent. Grosvenor has performed with orchestras such as the London Philharmonic, Philharmonia, the Tokyo Symphony Orchestra, and the list goes on. In 2011, he became the youngest British musician to ever sign to the label Decca Classics. With all of this recognition, Grosvenor, like many other talented musicians, still needs to practice every now and again. Spending time in a practice room with a couple of pals, Grosvenor suddenly broke out with John Philip Sousa's "The Stars and Stripes Forever," as originally transcribed by Vladimir Horowitz. In case that wasn't great enough, his friend hopped on the piano to join in on the fun. Even the cameraman is completely flabbergasted by their incredible piano skills.