It's true that any half-decent compact camera could probably get a shot like that. With many digital camera sensors now able to operate at very high shutter speeds, without loads of noise, a photo like that would be quite easy. I'd even say that some cameraphones, if set to sports mode, could possibly get that shot too.
I presume the photographer (a spotter I presume) heard a train was approaching in the tunnel and was intending to take a picture of the train emerging. No doubt other trains were photographed too, and these didn't reveal anything 'of interest'.
What's more, the photographer is almost certainly going to have been unable to see the paper when taking the picture. Whether looking through the lens, or even a 3/4-inch TFT screen, it would be impossible to see. This was obviously spotted later on when the photos were put on a large screen, or perhaps even uploaded somewhere.
I presume the photographer (a spotter I presume) heard a train was approaching in the tunnel and was intending to take a picture of the train emerging. No doubt other trains were photographed too, and these didn't reveal anything 'of interest'.
What's more, the photographer is almost certainly going to have been unable to see the paper when taking the picture. Whether looking through the lens, or even a 3/4-inch TFT screen, it would be impossible to see. This was obviously spotted later on when the photos were put on a large screen, or perhaps even uploaded somewhere.