Blonde In A Film

Once there was a blonde who was playing an important part in a movie. The director says to the blonde,
"Ok, if you could just kneel over there honey..." and gestures to a spot on the set.
The blonde kneels down, and starts wailing and clutching her head.
"Quick, get her to the hospital", says the director.
So they phone an ambulance, and it comes and takes the blonde, still wailing, to the hospital.
When she gets there, the doctors do some x-rays on her head, but can find nothing wrong.
"What's the matter?" they ask her in desperation.
"My knee hurts" she groans.

NO OFFENCE TO BLONDES