I can safely say that having recently spent 8 odd hours stuck on the M8 motorway in about 2.5ft of snow in a car with limited petrol in it and not being able crank up the heater - then having to abandon said car about 2 miles from home and having to use shank's pony for the final stretch home when outside temps were around -5 degrees - Yes, I know exactly what chilled to the bone means - and how long it takes to get the core heat levels back up again.
