Jethro and Pearl are driving in the truck to Jed's place. Pearl can't help but notice there seems to be something wrong with the braking system.
Pearl: Jethro? Jethro: Yes, Momma? Pearl: Did you take care of those old spring brakes like I told you? Jethro: [cheerfully] 'Course. I pulled 'em off yesterday! [beat] The new ones are comin' in the mail next week! (cue Pearl wailing in terror)
And the ultimate result: Jethro running the truck right into the Clampetts' outhouse. Three guesses as to who's inside.
Granny: [slapping him] You dog-blamed simple-minded hay hoop! Your plum-cluckin' head's emptier'n last year's bird's nest!
Granny (who is currently tied to her rocking chair) getting knocked off from Jethro's car by the tree branch they're driving under.
For those who don't understand why she's tied up, she refused to move with the rest of the family to California and said nobody would move her from her Rocking Chair so what does Jed do? He ties rope around the chair and puts her on the car
The Clampetts being flipped off by an irate motorist, and mistaking the gesture for a friendly form of greeting.
Another set of motorists later holler at the Clampetts for cutting them off, to which they respond with a friendly flip-off. The skinhead in the passenger's seat pulls out a pistol on the Clampetts...
Jed: [looks] That's real nice, son! [pulls out shotgun] This here's what I carry!
Tyler turning the office into a disaster area, while trying to walk to Mr. Drysdale's office.
The gathering of the Clampett relatives contains a little Take That.
Clampett Relative: (to the reverend} Reverend, you think Cousin Bill's not gonna be too busy to make it to the wedding?
President Clinton: (with "Hail to the Chief over a shot of the White House) Hillary, where did I put that invitation?
Jethro "learnin' Elly May to ride [his] motorcycle" as Jed is meeting with a prospective new wife. The driving changes hands between Elly, Jethro, and Granny in the same scene, and Granny ends up driving it into the swimming pool.
Jethro wanted to be (in his words) "an astro-nut", so he created his own space suit. We are introduced to the suit as follows, when Jed and Granny are discussing his current obsession:
Jed: That boy ain't got nothin' in his head but space.
Granny: (Chuckling) You can say that again!
Jed: Oh, now, that's not what I meant, let me rephrase it.
Jethro appears, wearing a suit consisting of aluminum foil wrapped randomly around his body, even larger clod-hopper boots than he usually wears also wrapped in foil, a fishbowl on his head, and a television antenna duct-taped to the fishbowl, and walks across the scene.
Jed: You know, I think I'll just let that one stand.