Shelley Duval and Stanley Kubrick
Most people know that Shelley Duval was never the same after filming The Shining. Director Stanley Kubrick subjected her to psychological torture to get her "into the zone" for filming. He would make her cry for hours, keep her isolated from cast and crew, and even after her re-record emotional scenes so that she would become exhausted.
She recorded the baseball bat scene 127 times. Naturally, the two did not keep in touch after filming was completed.