This happens every year, despite the ample warning signs written in several languages that are posted everywhere in the park.
If you don’t respect Yellowstone, it will put the hurt on you.
Flat landers go to Disney World and their kid is ‘gator bait, Florida Man takes the family to Jellystone and the kid gets flipped by a bison. Everyone’s living in a Nerf world, where nothing can hurt you. Until it does.