The labor day right before 9/11/01 - I didn't pay careful attention to my itinerary, was dining out near the airport with some friends, and relied on them to take me to the airport (I left Sunday night, most folks were leaving Monday). As we pulled into the airport, I realized my flight was leaving in 20 minutes, not say, 50 minutes. This is pre-kiosk days at DL. So the agent at the counter looked at her watch, saw I wasn't checking bags, gave me a slight dirty look, and then gave me a BP. Got to the gate with a few minutes to spare.