And we got a virtuoso to play it for us
Watch an incredible video of one-handed cellist Michael Spencer performing in Utah.
Resting the cello between his knees, Michael uses his arm on the strings to change pitch, using vibrato to colour the longer notes. Watch the inspiring video below.
Since the video was posted last month, musicians around the world have expressed their support and amazement for the inspiring performance. Cellist Richard Harwood said he was 'pretty astounded and blown away', with his Facebook followers suggesting he plays better than they do.