First time Carey and Arwin kiss.
In this episode, London talks about the tip of the shoelace that no one knows the name of, Maddie replies that it is an aglet. In Season 2 Episode 3- "Tip of the Day" of Phineas and Ferb (for which Ashley Tisdale provides the voice of their sister Candace), they write and perform a song called A-G-L-E-T as no one can remember what the tip of the shoelace is called.
Fourth appearance of Max.