Check out this video of Derek Andresen, a probationary firefighter in Mesa, Arizona.
After answering a call at an assisted-living facility, he sat down at the piano and showed off his skills. Here he is playing "Fur Elise," a classical song by iconic pianist Beethoven.
Captain Tim Burleson of Engine 220 was on hand to film the moment when Andresen started playing the song.
The video was uploaded on social media by the Mesa Fire and Medical Department and has since gained a lot of attention.