It is incredibly difficult to change the water temperature quickly, because even though the gradient of temperature is high between the water and the space, the water absorbs heat remarkably well. In addition, due to the surface tension, water tends to be in spheres, it actually reduces the amount of surface area it has to heat up and its sub-zero environment. The freezing process would therefore be surprisingly slow, unless there was some way to expose the entire water molecule by the space itself. But there is no such limit to pressure; it is zero without water, so boiling can be done quickly, putting water in its phase (water vapor)! But if that water boils, keep in mind how much volume the gas absorbs in the liquid, and how far away the molecule is. This means that immediately after the water boils, this water vapor - now under tremendous pressure - can cool down very quickly! Once you reach below 210 K, you will enter a solid state of water - ice - no matter what your pressure is. So it firsts boiling water, then a fine mist that turns to ice, forming a fragile, fine network of ice crystals.