Yeah.. really hard to read, but a couple of things; the girl going "kyahahaha" is not the one getting the BE, it's the other girl- (see the long hair?).
Also, the girl with BE in the panel after that is saying "yada" and "konna yadaa" etc. which means "not like this" or "I don't like/want this". So my best guess is that the long-haired girl is causing the changes and is laughing because she's tyrannical and asking "what is this?" as in "what? don't you like it?". I've always associated kyahahaha with the laugh from Final Fantasy VII where that one woman from Shinra keeps laughing maniacly... I think her name starts with an L...
Anyway- that's enough for one post. >_<
later
Edit: just noticed no one was making the mistake of mixing up the two girls... sry.. guess it was just me >_< lol