A Feb. 23 Instagram post (direct link, archive link) by The Other 98% includes an image showing an upside-down U.S. flag draped ... as possible,” spokesperson J. Elizabeth Peace said.

Pineapple upside-down cake features soft, buttery cake crowned with caramelized pineapple and cherries. As the cake bakes, juices from the fruit seep into the batter, keeping it moist and sweet ...

What flight crews don't tell you is what to do if you suddenly find yourself in an upside-down aircraft. For the passengers of a Delta flight on Monday, that became an extremely crucial detail.