Just the word Siberia makes most people think of frozen wildernesses, reindeer herders, gulags and coldness, and the first time you step out in these sorts of temperatures is, well, it's a bit shocking.
Winters are brutally cold and can range from -10 to -60. Add to this windchill from the back of a motorbike - which at 40mph some calculations suggest subtracting another 40 odd degrees - and you are talking seriously cold.
At around -17 the moisture inside your nose freezes the second you step outside. After five minutes your eyelashes will have frozen, and the cold will be punching you in the lungs like a heavyweight boxer. Take your gloves off for a minute and the cold sears through your fingertips. Take your gloves off for five minutes and you could already be developing frostnip, and worse.
Extreme cold can also be sneaky, creeping up on you in a painless attack, robbing the sensation from your extremities without you feeling a thing. Only when you come into the heat (if you're lucky) at the end of the day do you feel the agony in your deadened feet.
In short, the cold is dangerous, and things can go wrong very, very quickly at these temperatures.