Quote from George in The Airport
George: There it is. Gate 46. We got plenty of time. Kramer: Grossbard's plane leaves in ten minutes. I still got time to catch him! George: How you gonna catch him? He's probably boarded the plane already. Kramer: Give me your credit card. George: My credit card? Kramer: Just give me the card, don't ask me any questions. George: I'm not gonna give you my card unless you tell me what it's for! Kramer: I'm gonna buy a ticket. I'm gonna get on that flight. George: What? Are you, nuts? You're gonna spend more on the ticket than you're gonna get back from Grossbard. Kramer: No, I'm not gonna use the ticket! I'm gonna get my money, I'll get off the plane, I'll turn your ticket in for a refund. It's not gonna cost you a dime! Now, come on, give me the card. George: This is a great idea! Here, use this one. I get frequent flyer miles with every purchase. Wait, get two tickets. As long as you're returning for a refund, what's the difference? I'll get double the bonus miles.