From Wikipedia

The Half Ton Man

Patrick D. Deuel
(born 28 March 1962)

of Nebraska, was one of the heaviest people in the world. He was the subject of the documentary "Half Ton Man" in Channel Four's BodyShock series, in which Rosalie Bradford gave advice after achieving a record-breaking weight loss of 410 kilograms (900 lb).

Deuel is a former restaurant manager. At one point, he had not left his house, or even his bed, in 7 years. He stands at 175 cm (5 ft 9 in). At his peak he weighed 486 kilograms (1,070 lb); at the time, the only scale that could be used to weigh him was a livestock scale.

He was so enormous that his bedroom wall had to be cut out to extract him from his home. Then, he was rushed to a Sioux Falls, South Dakota hospital in an ambulance with extra-wide doors and a ramp-and-winch system that had to be dispatched from Denver .

Gastric bypass surgery was thought to be his best chance for permanent weight loss. A second operation removed a mass of fat and skin hanging from his midsection.

After 12 months, Patrick lost 260 kilograms (570 lb). After leaving the hospital, Patrick lost even more weight, reaching 170 kilograms (370 lb), a notable 318 kilograms (700 lb) loss.

Since then, Patrick had a setback and his guess is that he now weighs 193 kilograms (430 lb).