I saw that too. I figured nervous chatter--esp. for Kate. With the way Pam danced, she may have been a little "high" on something, she may have been quite entertaining back there.

Drinking would actually be a bad thing with hepatitis C, right? I dunno, she acted "something".
Kate seemed so nervous, very uncomfortable. I think it was hard to her to find a smile when she was concentrating so hard, knew she was struggling and just so nervous. Not something you can fake--going out there and dancing in front of millions, live.
I thought the shopping cart comment was right. But meanish. But right. But she tried and you could tell at the end when Tony patted her back that it was a there, there type of pat--like "you got through it, see?!"
Her dress was a pretty color but ugly. Too covered up, while most of the others were too skimpy. I thought the style of it was too much material. It was a waltz so it needed to flow, I suppose but still...too much.
I thought she was relieved to have lived through it. I also thought she seemed vulnerable just like the lady judge said. Probably because she is.
Oh and as for Kate looking thick...it was definitely the dress. Her body has turned into a beautiful one--she was never really heavy (besides all the extra skin) and I always was amazed at how well she did look but she is toned and in great shape now. You could tell in rehearsals--wow!