In-N-Out Burger used to let customers add as many extra patties with cheese as they wanted to their burgers until one group of 8 ordered one with 100 patties which contained 19450 kcals.
Apparently, it all started back in 2004 in Las Vegas, Nevada. A group of friends having a good time decided to get a 100 patty burger at In-N-Out, a fast food chain found widely on the west coast of the United States. At that point, In-N-Out allowed people to add as many patties with cheese they wanted. In this case, the 100 patties came to $97.66. The group of 8 managed to down all 100 patties together, and all of them got extremely sick, mostly from the large ingesting of greasy cheese.
The total amount of calories they consumed was 19,490 (a good 10 days’ worth). It took them less than two hours to down them all, and only one of the 8 barfed. As a result of this impressive (?) feat, In-N-Outs now generally only allow 4 patties per burger.