The shocking moment a passenger took a walk on an airplane wing
https://edition.cnn.com/travel/article/passenger-takes-walk-on-airplane-wing/index.html
When she tried to open the emergency door, crews should have noticed her attitude. Unless she experienced job related with airplane, she won't be able to open it. So, she must have taken much time to go out of the aircraft. That means much time was given to crew members to notice her behavior.
