Hahaha... Can relate. Visited a brother in the UK during winter from the tropics. So on board I was in jeans and a t-shirt. Only the airport didn't have the boarding tubes, so we had to walk from the plane to the bus, then from the bus to the terminal. I severely underestimated the distance, had no jacket (in my luggage) and was just trying to maintain 'cool' the whole time, controlling breathing and fighting the shivers the whole time.