In the book version she was a calendar pin-up and porn comic character who was obsessed over her estranged husband, comic strip star Roger Rabbit.
Rachel then points out that Jessica's a cartoon and that she's well out of his league.
As the taxi runs into a lamp post, Jessica and Hoskins are both thrown from the car; Jessica lands spinning, which causes her red dress to start hiking up her body.
She is re-imagined in the film as a sultry human Rabbit being merely her husband's surname cartoon singer at a fictional Los Angeles supper club called 'The Ink and Paint Club'.
Animators have traditionally amused themselves by slipping occasional racy frames or other gags into their work, frames which flash on the screen far too briefly to be detected by theater audiences.