Glenn Close struggles to watch her character's violent death in 1987 movie Fatal Attraction - because she was pregnant when she shot the chilling scene.
Close was called back to the set six months after the film had wrapped, because director Adrian Lyne was unhappy with the ending - in which the actress' psychotic character committed suicide.
Instead she was called upon to fight with co-stars Anne Archer and Michael Douglas, before her character Alex Forrest was shot dead.
The simulated struggle was so violent, Close was knocked out when her head was accidentally smashed against a mirror.
She was horrified when she later discovered she was pregnant with her daughter Annie.
Close reveals, "I got concussion. I didn't know I was pregnant at the time. I found out later. It was OK though."