On November 25, while performing "Mr. Potter" at 'Blue Star Concert,' Ki Hee Hyun fell off a tall stage while dancing. In the video above (0:43) you can see her fall completely off stage. One of the members who saw what happened rushes to see if she is okay, and you can see Hee Hyun get back up, but she has her hand on her back, as if she is in pain.
A littler later in the video (1:10), Hee Hyun runs back on stage and finishes performing! What a trooper!
Many fans are worried that the DIA members and other idol groups are performing in unsafe stages; Singers falling off stage because the stage was too small or poor conditions are happening too frequently.