In the factory where I was it turned pitch-dark like midnight in an instant. I was so near to the ground zero that I didn't hear the explosion. As soon as it flashed over the whole town, it turned pitch-dark again.
When I came to myself, I was in the boiler house, where the sprayer --- the main part of torpedo --- was tested. Trying to stand up I found myself in the boiler house. I didn't know when I had entered there, because I ran for my life. I felt my way in the dark and got out.
The two girls, who had been sweeping in front of the factory, disappeared. They must have been blown away. I walked for a while and met the chief of factory, whose left leg had gone because of being mutilated. It occurred by accident. His leg was mutilated.
Many people around there were crying. It was pitch-dark.