When it comes to burgers, calorie count and the customers at this Las Vegas restaurant, the bigger the better. Its Octuple Bypass Burger, at 19,900 calories, with 40 slices of bacon, is the most calorific burger in the world. Plus patrons weighing 350 lbs or more eat for free. However, it wasn’t fun and games anymore when a customer died of a heart attack outside the front of the restaurant in 2012.