How the title sequence of "It's a Mad Mad Mad Mad World" reflect the rest of the film

The summary of It's a Mad Mad Mad Mad World

The 'Big W' is four palm trees in a park that form a huge W. The money is buried in the middle. After the money is dug up, the detective arrives and confiscates it. He tells them it will go easier on them if they turn themselves in, and he leaves. However, the detective plans to keepthe money for himself. As he's driving away the others figure this out and chase him. They catch up with him, and the men pursue him into a condemned hotel and onto a rickety fire escape. The suitcase gets dropped and the money blows away in the wind. People on the ground gleefully collect the cash. The men are tossed from the fire escape as it pulls away from the wall, and they end up in the hospital with various injuries. At the very end, the bossy mother marches into the hospital ward yelling. She slips and falls on her fanny and everyone bursts into hysterical laughter.

I don't think that the titles of this film reflect the film. The titles of this film gave me the impression that it would be based on a fare ground or some sort of circus, however, none of this summary mentions anything about a circus. The titles also give me the impression that it's a happy film, but it doesn't sound particularly happy to me.