Rachel: Who wants the last hamburger?
Phoebe: Okay, that's it. Now I have to go see him.
Monica: Why?
Phoebe: Hamburger? McDonald's? Old McDonald had a farm. My dad is a pharmacist.
Chandler: And E-I-E-I-O is what your mom said when your dad left her.
Phoebe: Yes!
Chandler: Really?
Phoebe: No.