

Along the way they make intense love, smoke Kools and Camels, eat burgers, drink beer and consider the future (''I'm sorry, Sailor,'' says Lula after some introspection, ''but the ozone layer is disappearing.'') Around Lula and Sailor Mr. In the center of the picture are the sweetly dopey, flat, shadowless figures of Lula (Laura Dern) and Sailor (Nicolas Cage), driving toward Big Tuna and earnestly realizing their destiny.

Lynch has taken this slim, vivid work and pumped it up into a cockeyed epic that goes back to the early days of Pop art. The novel ambles easily through conversation in which people's characters and lives are largely understood through the brand names they choose to drop. They, in turn, are followed by Marietta, Lula's mother, who is a former beauty queen, and a private detective named Johnnie Farragut. Gifford's novel follows Lula and Sailor from Cape Fear, N.C., to the end of the line in Big Tuna, Tex. Sailor Ripley is a gentle young man who has just served 22 months and 18 days for manslaughter, having killed a man who attacked him with a knife. Lula is just 20 years old and self-described as hotter than Georgia asphalt. ''Wild at Heart,'' which was awarded the Palme d'Or at this year's Cannes Film Festival, has as its inspiration Barry Gifford's road novel about Lula Pace Fortune and her lover, Sailor Ripley. They suggest that though the universe is without end, it may exist within the tip of a blade of grass. The Lynch films go several steps further: nothing in life is fixed. The response in a fun house is a pleasurably scary physical sensation. Without moving, one seems to plummet through pitch darkness.
