5-month old Sam had an ear infection and was struggling to fall asleep. So his father, David Motola, turned on his electric piano and began playing Johannes Brahm's classic lullaby. It was very effective. Within a few seconds, Sam yawned broadly, then faded into sleep.
What makes this performance even more impressive is that Motola didn't have any sheet music. He was playing by ear and arranging the piece on the fly.