In S1E14, Rory is telling her grandparents about the bird (Stella) that she had to take care of for class. Rory says, “Everything has to be logged. Eating habits, sleeping habits…” and Lorelai chimes in, “Houdini habits.”
Harry Houdini was an American magician and escape artist in the late 19th and early 20th centuries. He escaped from straightjackets, graves, and even wooden crates that had been dropped into rivers.