Albert Whitted Airport, St. Petersburg Florida. I was taking my dear departed husband for a jolly in a rented Warrior, to look at the lovely beaches. Set up for return to Runway 36. ATC told me that ahead in the circuit was not one but TWO experimental aircraft, flying in formation! I saw them all right, there were two of them, and they were flying so slowly I couldn't hang in the air behind them, so got permission to orbit for spacing.
And when I had made my orbit, the two flying bedsheets had completely vanished! I carried on down the approach, eyes on stalks, and of a sudden saw them, on my right, sashaying down the final approach for Runway 27!
Said I to the Tower, in an accusatory tone, "You've changed the runway!"
Said the Tower "We wondered when you would notice......!"