Good day, bad day, in between - this 1 minute video will put a smile on your face. An elderly couple walked in to the Mayo Clinic lobby, saw a piano, and played an impromptu duet. The man, who is turning 90, obviously wasn't there for knee surgery, based on the way he was bopping up and down. Check out the cuteness starting at 0:44 seconds, when they start trading places.

Happy Friday!