"Prior to filming, Johnny Depp swapped his car for Hunter S. Thompson's red Cadillac convertible and spent weekends driving it around California in preparation for the role. Meanwhile, Hunter S. Thompson spent that period in Depp's car with a woman named Heidi, writing an essay called "Fear And Loathing In Hollywood: My Doomed Love At The Taco Stand" that was partially published in Time Magazine, along with a new Ralph Steadman drawing of a gargoyle-like Dr. Gonzo."