In S1E15, Lorelai, Rory, and Christopher are having drinks with Emily and Richard. Emily says to Rory, “I know one thing for sure, you certainly have your father’s musical talent.” Lorelai, highly amused, says, “Oh. wait just a minute. Mom. neither of these two have any musical talent.” Christopher counters, “Hey, I play guitar!” Lorelai responds, “You know the opening lick to ‘Smoke on the Water.'” Christopher says, “And I’ve since mastered the opening lick to ‘Jumpin’ Jack Flash.'”
“Smoke on the Water” is a song by Deep Purple, from their 1972 album “Machine Head.” Amateur guitar players are notorious for playing its opening riff over and over… and over and over.
“Jumpin’ Jack Flash is a 1968 single by the Rolling Stones.