There are lots of rock-related gags in this comic: Page 2, 4th panel: a sign reading "Buy Zilch's Rock Candy"; another sign reading "Read the Daily Gravel"; a banner reading "Pebble for mayor" / Page 3, 3rd Panel: A sign outside an inn reads "Ye Boulder Inn"; a sign outside a theater reads "Now Playing: 'Rocks In The Head' starring Rocky Hudson, Rocky Marciano" [Rock Hudson was a famous movie star; Rocky Marciano was a heavyweight boxer] / Page 3, 5th Panel: A sign in a record store window reading "Rock Around The Clock with Rock Nelson"; Jughead mentions that they have "rock 'n' rock" music instead of "rock 'n' roll".