Michael Esser, 33, a world champion last year in martial arts for the visually impaired, ended up pummelling his 17-year-old attacker into submission.

• 麦可．艾瑟，33岁，是去年视障人士武术比赛的世界冠军。他后来把那名17岁攻击者痛扁一顿，直到他投降。