EJ, I found out why McHugh went nuts on Johnson. He's pissed her off for courtroom misconduct in the past...
"
McHugh noted that in a previous hearing, Johnson put his arm around a female prosecutor's shoulders, prompting her to tell him twice not to touch her..."
Linky
That pretty much answers your OP, and answers why she pulled her verdict. I think she was very calm and handled it real well, considering this part of the story. (Why it was never mentioned until now is just one of the many reasons why the media sucks so bad. Had they told the whole story up front, there's no drama. Heck, this discussion wouldn't have even taken place.)
It's real easy to see that he was mocking her. If he wasn't, then he's clearly just the stupidest person on earth.