When fuji 400 film first came out (back in the dark ages) I was given a roll by my local camera shop to evaluate. We were going out to San Xavier Mission on a photo shoot. We were packing up when I realized I had forgotten to shoot the 400. I loaded it up, but it was almost dark. We had a big full moon, so I decided to see just what the film could do. Set up the tripod and took some time exposures of the mission. By then it was completely dark.
Got home and developed the film, but didn't print it. Several weeks later I had a little solution left in my color print machine that I wanted to use up, so I grabbed the fuji stuff and printed it.
When it came out of the developer, I was upset to see that I had grabbed the wrong negatives. These were daylight pictures, and the lens must have been dirty because there were spots all over the blue sky. I wasn't until I was retouching out all the spots that I realized the shadows were all wrong. It was the fuji 400 film, shot by the full moon, and I was busily retouching out all the stars!