They don't give Mayim Bialik enough really good material. She's so good at the material they give her that she seems to be the sad character she's playing. Unfortunately, that character isn't very impressive until she lets loose like she did in this episode. The other time she knocked me out was when Sheldon get her a tiara; the way Amy reacted was pathetic and hilarious, and Mayim made that happen. She's a genius.