43 In that regard, it should be noted that the courts have generally been reluctant to criticise trial judges for actual or apprehended bias by having interfered too much in the eliciting of evidence from witnesses, or for otherwise taking too active a part in the presentation of the case.[13] A statistical count of the total number of interventions, or even the number of interventions against one side only, is unlikely to be decisive. What will ordinarily be needed to show apprehended bias is an overall level, or tone of intervention, which is quite out of the ordinary such that it demonstrates an appearance of pre-judgment, hostility, or partiality.[14] This Court has held that, even strong expressions of exasperation with, or disbelief of, parties or their witnesses will not necessarily give rise to apprehended bias.[15] The trend towards greater interventionism by judges, particularly through greater case management, suggests that appellate courts will continue to be cautious before concluding that bias (actual or apprehended) has been demonstrated.