There's a private pilot holding short of the runway in a Cherokee waiting for an MD-80 to land. As the MD-80 passes the Cherokee, one of the crew gets on the radio and says "What a cute little airplane, did you put it together yourself?"
Not about to let such an insult pass, our hero fires right back with "Why actually I built it from MD-80 parts. Another landing like that and I'll have enough to build another!"