Thanks for that hilarious history tidbit. The actual record makes it even better. From the wiki page for Taejong of Joseon:

The king himself rode a horse and shot arrows at a deer. However, the horse stumbled, causing him to fall off, but he was not injured. Looking around, he said, "Do not let the historians know about this."

I just made the connection to why they had a scene like that in a Korean show on Netflix, cool