After Chachi is diagnosed with diabetes he tells Fonzie that if he misses a single insulin shot he will "be history." Missing an insulin shot is not fatal to diabetics and they can often go days without insulin before feeling any major effects.
When Chachi (Scott Baio) meets the Cunninghams at Al's Diner and tells them about the offer to tour with the Beach Boys, Marion (Marion Ross) gets her names mixed up when she says, "Oh, Scott! We're so proud of you."