She said something? I thought they put this just to point out that Eri was looking pretty scary...
well Eri and Rika were having a contest to see who can keep their eyes open the longest. Usually Eri's good at doing this for a long time but couldn't do it this time. here's a
It starts on 3:24 and right when Eri can't hold it anymore it looks like she blurted out something at 3:49 and they blanked it, you can hear Yuko's reaction. And then she loses when she blinks her eyes.