This episode is full of references and tributes to the musicals of Stephen Sondheim. Jeffrey (Richard Kind) greets Beatrix (Rhea Perlman) in their hotel room by singing "Hello, Little Girl" from Into the Woods. Luca (Simon Helberg) and Daniel (John Mulaney) have a running in-joke in which they repeatedly sing a few bars of "Old Friends" from Merrily We Roll Along. Jeffrey tells Luca that he has done a lot of community theater, including Sondheim's Assassins, before both break out into "Everybody's Got the Right" from that show.
Milk is bad for ulcers because it stimulates the stomach to produce even more acid.
