In S1E18, Tristan hands Rory a notebook that she forgot in class, and they both move to exit through the doorway at the same time, almost colliding. Rory says, “Well, that could’ve been a potential Marx Brothers moment.”
The Marx Brothers were a comedy troupe consisting of the brothers Groucho Marx, Chico Marx, and Harpo Marx. Gummo and Zeppo Marx also performed with them for a time. They actually began as a singing group, but switched when they realized they had a penchant for comedy. They performed on Broadway and made many films.