I've been flying a lot these past few weeks. And with the exception of my 14-hour trip from Philadelphia to Portland, there usually are no surprises when it comes to air travel. Except today. My plane lands and some lady, sitting two rows in front of me, starts clapping. Everybody feels extremely awkward, yet a number of people actually join the applause. Unnecessary. Folks, it's not like the pilot can hear you clap.