As we have re-discovered, after a tragedy people look for a cause. In this medical malpractice case, a baby was born with brain damage after being deprived of oxygen. The parents claim the cause was failure to monitor the baby during birth; the hospital claims the damage preceded labor. Three of Plaintiff’s experts were excluded. The Court reversed the exclusions. The first expert was excluded because she did not respond to Defendants’ experts. The Court disagreed, as she might refute Defendants’ theory of causation which relied heavily on a study she critiqued. Two experts addressing the child’s life expectancy were excluded as an “ambush.” The testimony should have been initially disclosed, but the delay was harmless because: 1) the trial is months away, 2) the importance to Plaintiff’s claim, 3) Defendants’ own experts raised the defense, and 4) lack of evidence of bad faith.