At the car show there is an ad for an 1991 Candiru 4x4. "Candiru", or Vampire Fish, is a species of parasitic Catfish native to the Amazon Basin which have been known to swim up the urine stream and into the urethra of unsuspecting people going for a swim.
One day after this episode aired, Norm and Cliff made guest appearances on the NBC series Wings (1990), arriving in Nantucket for a fishing trip.
This introduces Carla's brother, for the first of two appearances. He will also appear along with other members of Carla's family in Honor Thy Mother (1991).
Sam buys bags of snack food from a grocery store. Each of the bags has the same design with black type on a white bag. This was a popular marketing trick from the early nineties at the time that warehouse clubs such as Costco first appeared. Some also-ran food manufacturers responded to this competition by introducing "generic" products in generic white packaging to make it seem as if this would translate into cheaper prices.