It happened after Mark hit the head singer of "Judas" is used a rod of iron by accident.
Tara Savero, makeup artist of Lady Gaga said she has suffered a concussion after the incident. Tara also ascertain the condition of Gaga will quickly recover.
To convince the audience that she was not seriously injured, she came out from backstage to apologize to the audience and immediately went on a concert. "I want to apologize to you guys, I've hit my own head and I think I might have a concussion. But do not worry because I will finish this concert, " Gaga says, as quoted DigitalSpy, Monday (11/06/2012). Gaga then finish the show by bringing approximately 16 more songs.