On Rory’s last day at Stars Hollow High, she drops a box full of the contents of her locker. As she’s crouched down to pick everything up, she is startled by Dean, who is just standing there staring. Rory exclaims, “God, you’re like Ruth Gordon just standing there with a tannis root. Make a noise!” Dean replies, “Rosemary’s Baby.”
Ruth Gordon was indeed an actress in the 1968 film, “Rosemary’s Baby.” She played Minnie Castevet, who gives Rosemary a tannis root charm as part of a satanic ritual. The exact scene Rory is referring to is not clear, as Minnie never stands over Rosemary with tannis root. She does look menacing when standing outside Rosemary’s door near the beginning of the film, however.