It's a Mad, Mad, Mad, Mad World (remember four mads). It's actually from 1963 and features nearly every popular comedian at the time.
The director, Stanley Kramer, had never directed a comedy. He was well known for serious dramas as follow, so directing a slapstick comedy was new.
Judgment at Nuremberg (1961)
Inherit the Wind (1960)
On the Beach (1959)
The Defiant Ones (1958)
The Caine Mutiny (1954)
The Wild One (1953)
High Noon (1952)
Death of a Salesman (1951)