The Skeleton
The skeleton found by Tuco inside the wrong coffin at Sad Hill Cemetery, was a real human skeleton. A deceased Spanish actress who wrote in her will she wanted to act even after her death.
Where did I dig that up you may ask? IMDB. It means that Arch Stanton was played by a woman. Yup, groundbreaking!
Anyway I'm planning to do a sequel. Anyone know who Eli Wallach's and Lee Van Cleef's agents are? Clint Eastwood is already onboard!