At the beginning of the episode, Kelso says, "I could *so* be a model". Ashton Kutcher actually got his start as a model before becoming an actor.
This episode marks the first time Kelso falls off the water tower.
When Eric tells Laurie he saw their parents having sex, the "murder" theme from Alfred Hitchcock's "Psycho" is heard.
At the beginning of the episode, Jackie is wearing a t-shirt with a picture of herself on the front. This type of t-shirt with iron-on pictures was quite popular in the '70s, although most people did not wear one with a picture of themselves on it.
When Kelso and Hyde are arguing in the basement, you can see a electrical outlet behind them. In an older house, it was uncommon to see a 3-prong (grounded) outlet.