[1] The tap-on bridge played only on the fifth-string is an example of pitch axis theory.
[2] Deep Purple performed the song regularly during Satriani's tenure in the band.
Appeared in Problem Child 2, during the food fight scene at Pizzariffic.
It also appears in the popular video game, Guitar Hero World Tour[4] and in the game Guitar Hero On Tour: Decades; in these games, it is considered the most difficult song for the guitar instrument, especially at the Solo F section.
It is also available on Rocksmith 2014 as the hardest song to learn on lead guitar.