Although professional wrestling is worked, real injuries can be sustained. In such an event, the referee raises their hands above their head into an "X" shape to alert backstage officials and paramedics, as well as any other wrestlers that what is going on is really happening. An "X" sign across the chest is a warning, it signifies that a wrestler may be injured, but is still able to compete. In recent times, Total Nonstop Action Wrestling (TNA) and WWE have used the "X" sign to signify storyline as well as legitimate injuries. An example of this is when A.J. Styles was kayfabe injured after being hit with a powerbomb off the stage through a table by Bully Ray. Another example is during the 2006 Money in the Bank ladder match at WrestleMania 22 when Matt Hardy performed a suplex on Ric Flair from the top of the ladder, and the two referees, Jim Korderas and Mike Chioda, used the "X" sign. Flair re-entered the match minutes afterwards, showing that he was not legitimately injured.