After Johnny is knocked out by a woman he was flirting with, a band of sci-fi geeks find a dazed Johnny and become convinced he is a time traveler from 1963.
Little Suzy plays a Buttercup Scout who is determined to get Johnny to buy some of her delicious cookies. Johnny, not wanting to break his strict diet, travels all across town to escape Suzy, who foils his every attempt to get away.
When Johnny agrees to take the initiation trial for the “Brotherhood of the Gnu”, a fraternity that Pops and Carl are members of, he must face the daunting tasks of eating one potato chip and listening to Brother Ernie’s unnecessarily long story of buying a new couch.
When Johnny takes Bunny’s hot rod, Carl convinces him to enter an auto race, where Carl controls it by a joystick. When the joystick short-circuits, Johnny is left to drive on his own.
Johnny eats too quickly and gets a severe case of the hiccups. He visits a beautiful doctor who tells him that if his hiccups persist, he can come back for her hands-on treatment. To keep his hiccups going, Johnny tries to avoid the remedies of everyone in town.
When Johnny takes a bite out of Pops’ hot chili, he uses Carl’s fountain of youth potion to cool down the flames. This makes Johnny revert to a baby until 4:00 PM, but Bunny likes the idea of Johnny being little again.