My friend showed me this yesterday of David Choi (guitar) and Paul Dateh (violin) playing the theme to Super Mario. Paul Dateh apparently attended the University of Southern California Thorton of Music. It's not the Mario Theme you're used to hearing. Nonetheless it's 2:08 of pure delightfulness
UPDATE: Did you know...Paul Dateh could also sing?! Listen to him sing "Hope That You, and wait till 2:05 and he whips out his violin for an awesome instrumental part!