Sabrina, the Teenage Witch Season 1 Episode 10

Sabrina learns a hard lesson in witchcraft when she tries to make Harvey notice her by using her powers to become an instant kung-fu expert under Mr. Pool’s astonished tutelage. She easily defeats the standing champion, but must face the disapproval of her aunts and the jeers of the (magically animated) trophy she won. Meanwhile, Aunt Hilda tries out for first violin in the local symphony the mortal way, but loses to her longtime rival Gustav.