In Japan, people who have difficulty chewing can turn any food into an easy-to-eat jello-like version by blending it with Matomeruko-Easy powder*.
And thus the McDonald's 10-hamburger jello monster was born. Japan-based blog RocketNews24 separated the patties, buns, and pickles from 10 McDonald's burgers, blended the buns and patties with Matomeruko-Easy powder (which RocketNews24 says translates to "Easy Mix-N-Solidify Powder") and water, then layered the resulting goos to make this pile of semi-solid burger-flavored stuff. They don't say much about the flavor, besides that it was weak due to all the water they mixed in, and that its texture was like jello or flan.
...You can watch it in non-action below.
"We Mix and Solidify Ten McDonald's Hamburgers to create One Huge Hamburger" from Rocketnews24
* Ingredients, according to Google Translate: "Dextrin, glucomannan, xanthan gum, carrageenan, gellan gum, locust bean gum"