I have on atleast three occasions while taxiing very slowly when without a hint of warning I become a passenger on a jet that a split second ago I was controlling. The worst of it is there is not a clue when the combination of ice, taxiway slope, and wind forces combine with the lack of friction and the inertia to take control from you.
This. Exactly this. I HATE taxying on ice or snow and am quite proud to be the slowest aircraft on the airfield.