My husband and I took our seats for the long flight home after another visit with the family. The rental car return, security screening and fight for the overhead bins had all gone surprisingly smoothly. I sighed and relaxed. Then it started. Two rows behind us a man started talking. No, not talking. Bloviating. Loudly. He started holding forth and dispensing wisdom to his seatmate. Subject after subject, the plane was treated to his immense store of knowledge and experience. My husband and I turned to each other and simultaneously mouthed, "Blowhard." This fellow was a textbook example of a...