Actually you only have to be around 7'8" to weigh 500 lbs. There was a Roman emperor That was around 7'8" and the Romans weighed him at 500 lbs. His name was Maximinus Thrax. He was emperor from 235 to 238 AD. His own soldiers killed him. The image Iuploaded says he was 8'6", but this is considered to be way over exaggerated.