You were just sitting in your room some day, browsing the internet and listening to some chill music, when suddenly a Windows pop-up appeared on your laptop's screen. The application seems to be simply titled "Switch" and you can't figure out where it came from. The old-fashioned window has two textboxes in which you can enter some texts, as well as an unlabeled button. Taking a sip from your coke, you figured you might as well just enter in some random words.
In one textbox, you type "cola". In the other, you type "beer". Then you click the unlabeled button, and the world suddenly seems to spin around for a few seconds. After rubbing in your eyes for a second, you open them again and notice an unusual smell. The contents of your glass of coke seems to have magically transformed into draft beer! You take a sip from it and realize it's the real thing. Confused, you look again at the application open on your computer. The two text fields have become empty again, but other than that, there doesn't seem any change. You switch back to your browser for a second and enter "beer" into Google. According to the Wikipedia article about beer, the alcoholic drink is a popular soft drink everywhere. Meanwhile, the article about "cola" describes it as a beverage popular in bars and illegal for minors. It seems like cola and beer have completely switched places in this world!
Going back to the "Switch" application, you think about what other things you want to switch around. A lot of ideas come to mind as you finish your glass of beer and open another bottle.