This is a violinist of Japanese violinist Teppei Okada performing both the theme and sound effects for Super Mario Bros. levels 1-1 and 8-4, and the sound effect for the koopa shell against the stairs 1-up trick in level 3-1. Man, I still remember when my brother and I were playing Super Mario Bros. one time growing up and I managed to convince him one of the pits in a water level was actually a warp zone. Then he died and it was my turn again. Honestly, it’s probably still one of the greatest moments of my life. I also used to attack him with my Game Boy like it was a brick and whip him with the connector cord whenever he’d beat me in 2-player linked Tetris.

Keep going for the video.

Source: Geekologie – Violinist Performs Both The Theme And Sound Effects For Super Mario Bros.