A man in Las Vegas suffered a heart attack while eating a 6,000-calorie burger at the Heart Attack Grill.
The man, believed to be in his 40s, had to be carried out of the restaurant on a stretcher after suffering a cardiac arrest while he was eating the unfortunately named Triple Bypass Burger.
The 6,000 calorie burger contains three slabs of meat, 12 slices of bacon, cheese, red onion, sliced tomato and a 'unique special sauce'. It is also usually accompanied by "Flatliner Fries".
The man was wheeled out to an ambulance in front of the building and is now thought to be in a stable condition.
Heart Attack Grill - promoted with the catchphrase "Taste worth dying for" - is notorious in America for its mammoth meals, which can contain up to 8,000 calories.
Last year, the restaurant ran a promotion that offered a free meal to anyone who weighed over 25 stone (350 pounds).
Founded in 2005, the diner is run by former nutritionist "Doctor" Jon Basso, who reportedly used to run a Jenny Craig weight loss diet centre. In keeping with the restaurant chain's medical theme, the waitresses wear scantily-clad uniforms and refer to customers as "patients".
Basso denied the incident was an elaborate publicity stunt. He told Fox News: "The gentleman could barely talk. He was sweating, suffering.
"I actually felt horrible for him because the tourists were taking photos of him as if it were some type of stunt.
"Even with our own morbid sense of humour, we would never pull a stunt like that."