Viewers watched in horror as a knife thrower missed his aim and cut his assistant's head live on ITV1's This Morning programme.
Host Britton called for the injured woman to be taken off set
Circus performer Jayde Hanson, 23, was demonstrating his
skills when one of his knives hit his assistant and girlfriend,
22-year-old Yana Rodianova.
As she clutched the side of her head, the show's presenter Fern Britton shouted: "Oh my God, there is blood, quick - get
A This Morning spokeswoman said the wound was only "a nick" and that Ms Rodianova was "absolutely fine".
He felt confident as he has been throwing his mother's
kitchen knives since the age of 10
"You don't really expect that kind
of thing from a world record-holder," she said.
More than a million viewers had been watching Thursday's episode of the daytime show, made by Granada.
Mr Hanson, part of the Cottle and Austen Circus, was showing how many knives he could hurl at his partner in 60 seconds.
He had been trying to emulate his world record-breaking stunt performed on National Circus Day of 120 knives thrown in two minutes.
"He felt confident as he has been throwing his mother's
kitchen knives since the age of 10," This Morning's website reported.
In 11 years of performing, I've only hit my assistant on
Jayde Hanson, knife thrower
Mr Hanson, the son of an
elephant tamer and trapeze artist, is advertising for a new assistant.
Ms Rodianova, who bears two scars
from previously misdirected throws, says she wants to concentrate on her
hula hoop act.
Mr Hanson's previous assistant reportedly left the job after being
hit in the foot - her third injury from a wayward knife.
Mr Hanson said recently: "In 11 years of performing, I've only hit my assistant on five occasions."