During the thrid week of Jan, myself and three RFMD colleagues traveled to Finland for series of business meetings. While the meetings were productive I'm quite certain the trip to the sauna is what will stick in everyone's mind. In the Finish tradition, we went from the hot sauna (~100degC) to the cold pond (1degC) multiple times. Air is pumped through the water to keep the pond from freezing . With the ambient air at -20degC guess you could consider 1degC warm ?!?