She admits that she was shocked when the crazed fan rushed through security and tried to invade the stage pretending to be her pal.
"People do weird things. We were in the middle of the second scene of the first act and we're introducing the characters and I saw in the corner of my eye something shiny falling through the audience and I thought it was maybe a light or something," the Daily Express quoted her as saying.
"It turns out it was some derelict with a blue guitar running to the stage and turns out he said he was a friend of mine," she said.Johansson refused to let the fuss affect her performance and continued with the show - and she's proud she reacted like an old theatre professional.
"I think half the audience didn't even realised it happened. The show went on," she added.
