All joking aside, these sorts of temps shouldn't be taken lightly. Got a bit blasé this morning. Left nice warm tipi to shovel a bit of snow and didn't bother with gloves as it was only a few minutes work and shovelling keeps you warm. Within three minutes my hands were so cold I couldn't undo a zip. Back into tent to thaw them out. A salutory reminder about the speed with which extremities can be affected. Frostbite was probably only a few minutes away.