George: (referring to his plan for getting a third date with Heather) If there's any doubt, I do a leave-behind…keys, glove, scarf. I go back to her place to pick it up…date number three.
Jerry: That's so old. Why don't you show up at her door in a wood horse?
Jerry's quote is a reference to the "Trojan Horse" story from the epic Latin poem The Aeneid, written by Virgil. In the story, the Greeks hid soldiers in a giant horse, which they used to enter the city of Troy and open the gates for the Greek army.