Peter Rowswell of Langport, Somorset, UK was born with a clubfoot. The muscles didn't develop properly, so he recently had it amputated.
To make the best of the situation, Rowswell invited people to guess the weight of his leg once it had been amputated. He donated the revenues from the contest to the Royal North Orthopaedic Hospital.
The winner of the contest was Rowswell's own father, who guessed 3 pounds and 10 ounces. That was the closest estimate to final weight of 3 pounds and 8 ounces. The BBC reports:
Mr Rowswell, who holds black belts in a number of martial arts, said he plans to get back to training and back on a motorbike as soon as possible.
He will be fitted with a prosthetic leg in a couple of months and aims to be back at work in six months.
"I was quite clear how I felt that this is it - the start of my better life," he said.
"I do look at where my leg was and think 'I can't believe I've actually done it - had my leg chopped off' but I don't regret it, never in the slightest."
Mr Rowswell said took the decision to have his leg removed due to needing a "stupid" amount of pain relief just to walk.