Our winter vacation came to an end today. Tomorrow we'll go to work again in spite of the cold weather. Last night I dreamed about the front tyre of my bike which seemed to be deflating due to a puncture. This afternoon I pushed my bike to the front of the window where it was sunny and warm. It had been left in the porch since the beginning of the vacation. Now it had been covered with a thick coat of dust. I gave its tyres a check before displacing it. The front one was really flat as I had dreamed. I dusted the bike thoroughly and then changed the rubber tube of the valve and fully inflated the tyre. The deflation resulted from cold instead of a puncture.