This is the amusing moment a young student takes down a kung fu master - by accidentally kicking him in the groin.

The martial arts expert was teaching taekwondo stances to the girl Syamimi Sazilan, 16, in Kuala Lumpur, Malaysia, on November 26.

But eager Syamimi was bouncing on her toes before unexpectedly launched a cheeky front kick, misjudging the distance and whacking the man in the privates.

The low-blow caught the black belt off guard and he stumbled backwards in pain while bent double clutching his manhood.

Syamimi's friend, Aliya Imra, captured the amusing sporting fail while she was recording her friend trying to perfect her high kicks.

Aliya said: "My friend said that she tried to aim for her teacher's head, but her leg was stuck halfway. She didn't mean to do it, but everyone found it funny.''