Little Karate Joke

A little Karate Joke:

Helga's mom brought her to her first Karate competition. Noting that the organizers seemed a little shorthanded she approached the table. "Good morning," she said to the Director, "you look a little shorthanded. Anything I can do to help?" "Well it just so happens we're short a fighter for the under 90 kg division," the director replied. "Sorry," Helga's mom said, "I don't know a thing about Karate." "That's OK" said the director. "We need referees, too."