The guitar duel between the Eugene Martone (Ralph Macchio) and Jack Butler (Steve Vai), the devil’s disciple, in “Crossroads”. Blues master, Ry Cooder, plays all of Ralph Macchio’s slide guitar parts. Eugene’s final solo (known as “Eugene’s Trick Bag” and actually played by Vai) begins with a section of neo-classical composer Nicolo Paganini’s “5th Caprice” for violin (in the film, he’s a classical guitarist who learns blues from an old black harp player).