f(x) member Sulli is once again under the fiery criticism of netizens for her supposed poor stage manners.

 The criticisms started after a certain YouTube clip was uploaded this past weekend. The clip showed f(x) performing “Rum Pum Pum Pum” for the World Federation of Neurosurgical Societies symposium which was held on September 11, and Sulli became the center of attention for not performing the group’s dance routine.

 The partis where the members lay down on their stomach and eventually push themselves back up to the music, but Sulli was seen just squatting down while holding her skirt. Sulli was highly criticized by the netizens for her poor stage manners.

 However, others came to her defense by saying that she may have been exhausted from her sudden diet plan. Others blamed it on the short skirts f(x) members were wearing that might have made dancing uncomfortable for Sulli.

 What do you think?