EMILY: Leave now, please. [Christopher leaves]
LORELAI: You know, you need a mask and a horse when you do that.
Lorelai refers to masked heroes who ride a horse, such as The Lone Ranger, previously discussed, who rides a white horse named Silver.
Emily redeems herself in this episode when she orders Christopher to leave her house. She may have been pushing Lorelai to get back with Christopher by any means, but when she sees that Lorelai and Rory really don’t want Christopher there, she does her best to protect them from him (she’s good at setting boundaries when she wants to, the way she wishes Lorelai had done for her when she needed rescuing from a man).
Lorelai doesn’t often call Emily her hero, but this is a rare example when she does.