Whenever we use a personal airplane for travel, we impose on ourselves pressure to complete the flight. The same is true of driving a car, weeding a garden or writing a magazine article: There is at least one thing we want to accomplish by engaging in an activity. The pressure may be subtle, and most of the time it doesnt affect the flights outcome, but its there. But pressure often is not the least bit subtle. On one extreme, maybe weve simply told someone were going to fly over someones house at such and such a time. If were late, or dont make the flight at all, we might be accused of wimping out, or perhaps of not being a good enough pilot to find the house.