If you pour a bit of liquid nitrogen into vodka, you'll get fog as the nitrogen evaporates. This is a cool trick and may produce bits of vodka ice. Liquid nitrogen is extremely cold, all the way down to -196 C or -320 F. While liquid nitrogen may be used by bartenders to produce (literally) cool effects, it's critical to use caution. Frozen vodka is colder than a freezer, which basically makes it too cold to ingest!