IIRC at first she was trying to not get caught on being worried about Potamos and Josuke being in the other wagon of the train, the reason she stands up and laughs like that is because her friends noticed that she in fact was trying to know what is happening with Josuke and Potamos.
1:44 Rules & Regulations (Wedding Peach The Movie: A Wedding Peach Christmas)
0:57 2nd 4th Wall Break in the series, the first being Jama-Pi's Counterattack
What happened to her at 0:05?
IIRC at first she was trying to not get caught on being worried about Potamos and Josuke being in the other wagon of the train, the reason she stands up and laughs like that is because her friends noticed that she in fact was trying to know what is happening with Josuke and Potamos.