I clicked on one about Henry the 8th, which is a story Ive heard heard 100 times but whatever. It started out normal enough, then claimed he started carrying around a staff with a human skull on the top near the end. Made up artifacts and paintings.
The most egregious has to be the "World War II mechanic fixes entire allied plane arsenal with piece of wire" category. I've come across a couple dozen of these. Completely fabricated events and people that never seem to have existed.