O'Donnell, on the other hand, is a lump of white bread with good teeth. When he runs, he does nothing but propel himself from one place to another. He's incapable of being interesting when he speaks, let alone through physicality. It manages to get even less funny the longer it lasts. By the end, it resembles nothing so much as a funeral procession.
Inflation is at work throughout the sequence.
In Keaton's version, he plays a man too bashful to propose to his girlfriend. When he inherits several million dollars on the condition that he marry that day, he botches the proposal and has to seek out other likely prospects. This difference is small but telling. We care whether or not Keaton survives the onslaught of the brides because we know that he actually wants to marry his girlfriend. If he does wed his simpering girlfriend, he'll still be an oaf, she'll still pout and whine, and their kids will surely be insufferable.