In this same segment, the boy has the family eat hamburgers with peanut butter on them (and with candy instead of burger patties), which they evidently find unappetizing. Nowadays, peanut butter is a common hamburger topping at certain restaurants.
Much is made of Halley's Comet's return in "Kick the Can", which would happen three years later, and was a big disappointment.
Jerkass Woobie: Mr. Conroy comes off as cynical and bitter to the rest of the Sunnyvale's residents, but the first thing we see of him is his own son reneging on a promise to let him come visit his grandchildren.
The fact that an actor and two children died in such a horrible way during the production of this film.
Not to mention the "Kick the Can" segment, which can be considered this for some older fans. Particularly Mr. Conroy's heartbroken reaction near the beginning when his son rudely brushes him off - and his begging of a young teenaged Mr. Agee to take him with him.