it all depends on how "cold" it was where you left it.
you could get cold teeth
You don't want to unpack a computer that has been left out in the cold to help prevent condensation and static electricity.
it depends on how hot or cold the room tempature is
Since a computer is not a liquid, it would not freeze in the sense that water freezes and turns into a solid (ice) when it gets cold enough. A computer that is not turned on will be at the temperature of its surroundings and if left in an unheated room in the winter in a cold climate, the parts of the computer may be colder than the freezing point of water. Computers, like many other machines, have optimum operating temperature ranges. If you try to operate a computer in an environment outside that range it may work poorly or not at all. If cold enough, a computer will not work well. In particular, if a computer has a liquid crystal display screen, cold temperatures will slow screen response and if the temperature is cold enough, the screen will not work at all.
What will happen to gum is it will feel cold. Nothing! Will happen to gum but you can try!
Some (hardy) plants would survive, other delicate plants would die.
It would spread on its own.
Cold Fear happened in 2005.
Cold Winter happened in 2005.
Cold. Very cold.
you get cold
You'll get cold... you might get a cold or a flu...so sick and cold