Funniest scene

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Yeah, Clark's meltdown in the car is the funniest scene in the movie.

I don't remember the exact video games or the exact character lines but the basic scene is something like this: Rusty to his cousin: "do you have Pac Man?" "No." "Do you have Space Invaders?" "No." Do you have "Asteroids?" "No, but my Dad does, sometimes he can't even sit on the toilet.!"

All the scenes with Clark trying to look cool speeding alongside Christie Brinkley. Just the idea that he's ever going to look cool with a dorky station wagon with luggage on the roof, almost getting into a head-on collision. Also, the scene where Clark pictures himself in the passenger seat with her, wearing sunglasses, smoking a cigarette, just chillin'.

The whole scene with Clark later at the motel bar: When he is trying to hit on women, making a fool of himself. And when he is lying to Brinkley about it being his brother's family and ring, and how it's all an act, and it's fun for his brother's family. The ridiculousness of owning a chain of motels and an airline. The face he makes after he says, "look like a fool" is so hilarious.

That scene and his who discarding Edna and her passing all them scenes just made me cry in laughter and when his wife said that tent stunk and he went "Here's your tent Edna" lol

Eddie: "You look like you could use a cold one."

And Clark's hilarious fumbling with a nearly empty beer can

One of my favorite scenes has to be when there at park eating lunch & they find out the dog wet on the basket. The actions that Chevy Chase show are to funny.

Everyone posting here seems to like low-end laughs of cussing or bathroom humor. I prefer wit, and actually laughed out loud when Clark said the Grand Canyon was the biggest hole, then Aunt Edna mouthed off something, to which Clark said "make that the second."