At Tokyo Station...

I saw a woman fall down the escalator. She was probably about 30 and I don’t think she got hurt, but when I was at the top she started yelling. I looked down to see a woman roll over two or three times while remaining in the exact same spot because of the moving stairs. I tried to find a ’stop’ button at the top, but there didn’t seem to be one. I guess my latent childhood fear of escalators has some basis in reality.