Because the trial court’s error in preventing plaintiff from replaying a portion of the deposition during summation at the first trial resulted in a miscarriage of justice, the trial court properly granted plaintiff’s motion for a new trial. Further, the trial court erred in permitting Dr. Vasen to bolster his testimony using "congruent" opinions in reports of non-testifying doctors during the first trial rather than simply explain the sources of information used in forming his opinion.