Lorelai Gilmore: I'm going to the coat closet to make out. Don't eat my chicken.
Rory Gilmore: That's going on your tombstone.
When Lorelai, Rory and Max are having breakfast at Luke's, their coffee cups change from red to blue in one shot. Also Max's coffee cup goes back and forth from the left side of his paper to the right.
In some episodes, Rory speaks Spanish (e.g when she is talking to her grandmother's maid). She speaks very poorly, typical "school-Spanish". This is just acting; Spanish is actually Alexis Bledel's first language. Her mother is from Mexico and her father is from Argentina.