were not in Kansas anymore

To say were not in Kansas anymore means that the person or group of people is no longer in comfortable and quiet surroundings. Typically it is said when a group of people enters an environment, building, or location which is very different from where they grew up or what they are normally accustomed to. The phrase originates from the movie The Wizard of Oz in which Dorothy says this to her dog when she is in a very new place.