Why didn’t we see any of that question dance dazzle on the stand? I can’t believe he was “I don’t remembering” in the instances Lewis was referring.

We did! He was doing exactly what he did to everyone else whose questions he tried to evade, it's just that this time people called him on it (and had legal power to compel non-evasive answers).

Audience. What may come across as question dance dazzle might suffice to impress or allay concerns of certain people (employees, investors, etc), but it's not probable to work the same under oath and the techniques of prosecution. It's hard to dance around evidence with what you say, no matter how its said, with evidence to the contradictory put right in front of the court.