TAE Kwon Do black belt Charles Salmon was so fed up with his mum nagging him about his long hair he shaved it all off and raised more than £250 for charity in the process.
When the 14-year-old Bradon Forest pupil told his Tae Kwon Do instructor John Danby about his plans, John didn't believe he would do it.
He told Charles that the club Leigh Childs Black Belt Academy would give him £100 if the schoolboy could raise £50 himself.
By the end of the class last Tuesday he had collected more than £50.
With the help of family and friends he went on to raise another £100, taking the total raised for Breakthrough Breast Cancer to more than £250.
Charles' mum Eunice, 43, organised the Breakthrough Breast Cancer breakfast in October and also co-ordinates the Swindon Moonwalk each May, when teams of women walk round London at night.
The challenge began last week when Mrs Salmon told Charles his shoulder-length hair would have to be cut because he was going to school with it dripping wet.
He went to Old Town hairdressers Talk of the Town, where they shaved off his locks free of charge when they learned it was all for charity.
"It all came about as a result of brinkmanship between him and me," said Mrs Salmon, who works for Swindon Council.
"Nobody thought he would go ahead with it."
Although Charles is pleased with the amount of money he has raised, he is not so happy with his new hair cut.
"I really don't like it," he said. "I'm not going to go to the hairdressers again for a long time.
"I'm going to let it grow out. It was all worth it though, just to call my mum's bluff."
Charles, who lives in Nine Elms with his parents and his sister Laura, nine, also plays in a rock band called Impetigo with school friends.
According to his mum, he didn't have his head shaved until after their concert, so he could keep his rocker look.
He started learning Tae Kwon Do three years ago and attends classes at the Leigh Childs Black Belt Academy twice a week.
He was presented with the £100 cheque at practice on Thursday night by the school's chief instructor John Danby.
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