A disabled heavy metal fan has been found guilty of attacking a fellow fan at an Alice Cooper gig.
Andrew Miller, who wears a prosthetic limb after losing part of his right leg in a motorcycle accident, was convicted of assault causing actual bodily harm.
The 46-year-old Hampshire rocker took off his top and his false leg at Southampton Guildhall and punched John Lynch after his victim asked him to calm down, the city's crown court heard.
Southampton Crown Court was told Miller, of Church Road, Emsworth, made a nuisance of himself when he sat down to watch the concert on July 25 last year.
He then punched John Lynch, a service manager for disabled adults and children, several times after his victim asked him to calm down.
Miller told the court that he had acted out of self-defence and had only punched Mr Lynch after he had hit him with his own motorcycle crash helmet.
The court heard that Mr Lynch suffered bruising to his shoulder, elbow and cuts and bruises to his head while Miller suffered a fracture to his right hand.
Judge John Boggis QC told Miller: "This was a nasty unprovoked attack.
"Why people like you have to go and spoil a night out for decent law-abiding people I do not know."
The judge adjourned the case for reports to be prepared on Miller who was released on unconditional bail until he is to be sentenced on July 8.
