When taking a bite of a sundae with red and green colored ice creams, Al takes a spoonful of the red side and states he doesn't like mint. Green is typically used for mint ice cream.
When Richie asks Fonzie if he's ever been scared, Fonzie replies that he has only one time, when he was 7. But Fonzie had told Richie that he was scared when he became blind in an early episode.