The Hollywood actor and wellness guru, 50, is being sued by Terry Sanderson, 76, who claims she ploughed into him at a luxury ski resort.
Mr Sanderson, a retired eye doctor, is hoping for $300,000 (£250,000) in damages after alleging Paltrow crashed into him and caused severe and long-lasting brain injuries.
The Oscar-winning actor has previously called the lawsuit an attempt to exploit her fame and celebrity and claimed Mr Sanderson crashed into her.
Paltrow took to the stand to testify on the third day of the trial and began by describing herself as an "intermediate" skier and familiar with the rules of skiing.
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