Panel 1: I can’t place Gerald’s face. Maynard G. Krebs, Shaggy from Scooby-Doo? He certainly looks like he has dropped an IQ point or two. I really do not know what to make of what Duncan is doing. First, his right eye is freakishly higher on his head than his left eye as if they are kept horizontally stabilized even while his head is leaning to his right. Second, Duncan seems to be disregarding the seatbelt that would keep him strapped to the back seat. Third, and even more frightening is the eerie way he seems to be looking at the lower extremities of one Dr. John Patterson. I wouldn’t get bent out of shape about this except for what happens in the next panel.
Panel 2: Duncan’s body drops out of view as he yells out a “Who hoo!”, while Gerald conveniently looks away to the right, and Dr. Patterson has an expression on his face that I honestly can say I have never seen there. Plus, Dr. Patterson's seat belt has slid a little off his left shoulder since panel 1. Gerald may be excited by passing transports, but Dr. Patterson and Duncan may be excited by something else. Please tell me I am reading this wrong and it doesn’t really look like this.
Panel 3: It is difficult to determine who is saying these lines except (a) the line to the balloon is squiggly just like Duncan’s was in the previous panel, (b) the position on the side of the car would match Gerald or Duncan, (c) it appears to be some of the lyrics from Public Enemy’s What Kind Of Power We Got. However, it would be a strange song to quote for riding in a station wagon, so I may not have found the correct source for the “Power to the People” quote.
Panel 4: The punch line and thought “fried” come from Dr. Patterson’s side of the car and Duncan or Gerald has ceased quoting Public Enemy either from the power of the Dr. Patterson’s mighty thought or from hearing the police siren. I suppose the "joke" is that “fried” has some similar sounds to “flying”. It is nice to note however, that the Milborough Police have the wherewithal to keep hover cars in stock. No doubt it is to keep up with the horde of speeding Crevasses that are regularly sold by Gordon Mayes to middle-aged men driving teenaged boys at high rates of speed to impress them.