Foreshadowing: When Claire mentions to Haley meeting Arvin's parents is a relationship milestone, Phil mentions that he's still not over Haley's break ups with Andy and Dylan. Surely enough, guess who makes appearances in this episode in that same order (Rainer Shine appears too but Phil doesn't mention him)?
The Cameo: Andy, Dylan and Rainer Shine all rush to the hospital to see Haley because they're still in her emergency contacts.
