Fastest Secretary In The World

Before seeing this movie I didn't expected at such a speed. This woman is incredible. I would like to hear her story, and find out how she trained for such a performance, or what she did to become so good. In this clip from Japanese TV, this secretary stamps documents with superhuman speed. And when I say superhuman speed you'll see something really amazing. I didn't expected at something like this. How do you think she can stamp so fast ?