I was looking at web cam sites for my links pages and happened to catch a string of close to 100 single and double stack intermodals going by. The strange thing was that they were backing up. I know this because I caught the first car (not an engine) and watched the whole train go by. The cameras have a very fast refresh rate, about 5 sec and the train wasn't going fast. Is this normal operations? I didn't realize that they backed trains of that length that far. They have two cameras, one pointing north and one pointing south. I couldn't see the locos in the distance when the first car went past and when they did go by they went almost out of sight in the other direction. The nearest RR is 175 miles away so I'm not much of a railfan so I wondered, is it normal to back that long of a train that far?