<Li> The fourth and last overnight bag belongs to the mysterious "Mr. Smith" and contains top - secret government papers . There is at least some indication that he has them illegally and wishes to make them public (as a whistleblower of sorts (Daniel Ellsberg, of Pentagon Papers fame, was a prominent figure in the news during this era .)). The equally mysterious "Mr. Jones" identifies himself as from the government, and is on a mission to recover the documents . </Li> <P> Howard, Eunice, Mrs. Van Hoskins, and Mr. Smith all happen to check into the Hotel Bristol at the same time, whereupon Judy, trying to score a free meal, lodges herself there without paying, notices Howard, and begins pursuing him (to his bewilderment). Two hotel employees, Harry and Fritz, attempt to steal the jewels belonging to Mrs. Van Hoskins (and deliver them to three mean - looking thieves based in a rickety hideout on the waterfront), while Mr. Jones attempts to get the bag belonging to Mr. Smith . Over the course of the evening, the bags get switched haphazardly from room to room as the four parties unwittingly take one another's suitcases . Without realizing it, Howard ends up with the jewels, Judy with the documents, Mr. Smith with the clothes, and the thieves with the rocks . Meanwhile, Judy manages to use her humor, charm and academic knowledge to secure the grant for Howard while masquerading as Eunice (at the College of Musicologists banquet in the hotel ballroom, hosted by Larrabee), and then indirectly contributes to the destruction of Howard's hotel room (after Howard, to his shock, finds her taking a bath in his tub). The following day (after Howard and Judy share a romantic moment on a floor of the hotel under renovation), everyone makes their way to Larrabee's upscale Victorian home (filled with expensive modern art), where a major fight scene occurs (and the modern art, along with serving trays and vegetable dip, is used to hit people and knock them over). Howard and Judy take all the bags and flee through San Francisco, first on a delivery bike, and then in a Volkswagen stolen from a wedding party, pursued by the thieves, Mr. Smith, Mr. Jones, Eunice, Simon (covered in vegetable dip), Larrabee and a few roped - in bystanders . They go through Chinatown, down Lombard Street, and eventually into San Francisco Bay . All the protagonists finally end up in court, under the gavel of the world - weary, medication - addicted and curmudgeonly Judge Maxwell who, improbably, turns out to be Judy's father . At the shock of seeing his daughter in the middle of the trouble (she's been hiding in a blanket during the proceeding), he collapses along with his desk . </P> <P> In the end, everything is cleared up: Howard gets his rocks back, Mrs. Van Hoskins pays the considerable damages in Howard's name with the reward money he would have received for the return of her jewels, the hotel thieves are forced to flee the country and the papers are put back in the hands of the government . Judy exposes Simon as a fraud and plagiarist (thus getting Howard the grant), Eunice leaves Howard for Larrabee (who apparently tolerates her tightly wound personality better than Howard did), and Judy announces she is taking one more attempt at college, studying Music History at the Iowa Conservatory of Music with Dr. Bannister as her professor . The film ends on a suitably romantic (and silly) note as Howard and Judy proclaim their love for one another, sharing an airborne kiss while their in - flight movie is the Bugs Bunny cartoon that gave the film its name . </P> <Ul> <Li> Barbra Streisand as Judy Maxwell </Li> <Li> Ryan O'Neal as Howard Bannister </Li> <Li> Madeline Kahn as Eunice Burns </Li> <Li> Kenneth Mars as Hugh Simon </Li> <Li> Austin Pendleton as Frederick Larrabee </Li> <Li> Michael Murphy as Mr. Smith </Li> <Li> Philip Roth as Mr. Jones </Li> <Li> Sorrell Booke as Harry </Li> <Li> Stefan Gierasch as Fritz </Li> <Li> Mabel Albertson as Mrs. Van Hoskins </Li> <Li> Liam Dunn as Judge Maxwell </Li> <Li> John Hillerman as Hotel Manager Kaltenborn </Li> <Li> George Morfogen as Rudy, Head Waiter </Li> <Li> Graham Jarvis as Bailiff </Li> <Li> Randy Quaid as Professor Hosquith </Li> <Li> M. Emmet Walsh as Arresting Officer </Li> <Li> Sylvester Stallone as Hotel Guest (uncredited) </Li> </Ul>

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