The car came to a welcome stop. It was a chance to stretch legs for a few moments and bask in the sun and allow the warm air to wash over. The reason for the stop wasn't anything as humane as a refreshment break. No, siree. It was because we had come upon a crossing. By the time I got out of the car and sauntered up to the barriers, the blue metallic tube was whizzing off into goodness knows where.