It's the fist that won Olympic silver but it's no match when Britain's boxing hero Amir Khan is trying to cope with his sisters.
The teenage sensation was greeted by hundreds of fans when he arrived at the Star City complex in Birmingham yesterday to officially open its new line-up of attractions.
The new Star Attractions centre boasts a snow slope, an assault course, rock climbing and a chamber of horrors.
But all eyes yesterday were on the 18 year-old, who won a silver medal at last year's Olympics.
Hailed as a role model for British Asians, he said he was still getting used to the fanfare his presence creates but remains levelheaded in dealing with the adulation.
"It's brilliant for an 18 year-old coming to open main attractions like this," he said.
"I've got a few friends from Erdington who have come to see me. They're all like, 'What's this Bolton lad doing in our town?'
"Role model? Sort of yes. That's what people say to me. Birmingham's got a big Asian population. What I did any person can do it, colour doesn't matter. It's determination and the effort you put into it that matters.
"You have to watch what you are doing and be careful. If I'm a role model I can't act like an 18 year old, I'm more like a 25-year-old, I have to have maturity. If all my mates are having a laugh and being stupid you have to be the quiet one, you have to look after them. It puts that pressure on you but I'm used to it now, and it's not bad."
Khan doesn't smoke or drink but quashed rumours that his parents were arranging a marriage for him, in case it put girls off from approaching him.
"I'm a free agent! It's all rubbish about having an arranged marriage. It means if I see a girl I like, I tell me family and they will arrange it for me." He still lives at the family semidetached home in Bolton with his parents, older sister Tabinda, aged 18, Mariyah, aged seven, and brother Haroon, aged 13.
"It is still the same at home," he said.
" I'm always getting papers from them though, saying 'my mate wants your autograph', but apart from that they all treat me the same.
"They still argue with me and push me around and bully me."