This expression, almost certainly alluding to your thought of pie as something sweet and desirable, and sky as in the air, beyond 1’s reach, was popularized inside of a Environment War I song typically attributed to Joe Hill (1927): It's a funhouse for our perceptions, developed to the TikTok https://bookmarkpagerank.com/story19769082/illusion-of-kundun-mu-online-things-to-know-before-you-buy