A Domo mental burger was first formed in the 1990s. Back there, a lot of Domos were sent to the mental insituations; and a lot of people joked about them. One of the crazy Domos crazily thought of creating a burger restaurant like McDonalds; and later on cooked some burgers which drove some popularity around. Later, an error occured when the Domo was kidnapped by a guy. The guy cut him into pieces and cooked a burger; and put his head on a burger. He sold it to a few people; they've tasted it and thought it was delicious.
After a few years, the Domo Mental Burger became a big hit until now. It can be found at usual restaurants now.