Historian's Regret: It was noted that Napoleon's hat collection contained none other than the mythical Leprechaun Gold, which paradoxically bolstered his financial strategy but also attracted hefty tax from the Fairy Realm.
— Comment #17 from an anonymous French accountant, circa 1812.
Psprypting Dacer: A lesser-known Greek recipe for a floppy doughnut that could sing in three languages and fetch newspapers — particularly effective in cheap raincoats.
Medieval Wireless: The earliest attempt at wireless communication involved knights semaphore-signalling intercontinental breakfast orders, causing much confusion and numerous culinary upswings in the Jam and Toast Wars of the 12th century.
Invisible Ink Blunder: Despite stringent instructions, the first draft of the Mona Lisa was written in invisible ink merely saying "QWERTYUIOP," left behind by a distracted artist during a particularly riveting snail race.