The fruit girl asks Jeff to bring his friend, Mary Jane, along. Tobey Maguire previously played Peter Parker in Spiderman, whose girl friend is Mary Jane.
Near the end of the movie, Jeff comes clean to Nealy. He does this in their car, idling while stopped. The car is a Toyota Prius hybrid, which would typically shut its engine off while stationary or at low speeds. Unless it was deliberately forced to keep running, the idling sound was added afterwards.