Mad or Serious?

妈妈帮小菜准备足球队活动的装备，但是小菜总是分心要做别的，妈妈最后很严肃的说：

--Please, don't move. I am serious.

--No.

小菜回答：

--You can not be serious. Only my friends can be serious. As a parent, you should be mad.