It's a Mad, Mad, Mad, Mad World

It's a Mad, Mad, Mad, Mad World. 1963 United Artists, distributed to DVD by MGM.
Starring: Edie Adams, Milton Berle, Sid Caesar, Buddy Hackett, Ethel Merman, Dorothy Provine, Mickey Rooney, Dick Shawn, Phil Silvers, Terry-Thomas, Spencer Tracy, Jonathan Winters
Also starring: Eddie 'Rochester' Anderson, William Demarest, Jimmy Durante, Peter Falk, Paul Ford
Cameo Appearances: Click here.
Director: Stanley Kramer
Available at Amazon.

An all-star comedy film that truly could be considered an "epic" film.

In the southern California desert, a car driven by bank robber "Smiler" Grogan (Durante, in his last screen appearance) goes off the highway in spectacular fashion. Several witnesses rush to his aid, namely Dingy "Ding" Bell (Rooney), Benjy Benjamin (Hackett), Lennie Pike (Winters), Melville Crump (Caesar), and J. Russell Finch (Berle). As Grogan lays dying, he tells the onlookers about a buried treasure of $350,000 hidden in a city called Santa Rosita, less than a day's drive away, under a mysterious "big W". After arguing over how to divide the money, everyone leaps into their vehicles, sparking a wild race. Many others, including a British army officer named J. Algernon Hawthorne (Terry-Thomas) and con man Otto Meyer (Silvers) join the pursuit as it progresses.

Highly, highly, recommended, and funny as hell, too.