Lesson learned here! It's a good idea to be conscious of what is going on in front of AND behind the locomotives. I sure hope a lot of crews view this video for a simple reminder. Detectors are not infallible.A flame on the axle, which is about 2 feet underneath the locomotive, appearing in a small mirror almost 400 feet away is not as easy as you think. It would take a deep curve to the south (the train is moving west) to take notice something was flaming, and the next significant curve to the south on this line is 22 miles away.I always see myself coming back to see this video, it's fascinating. Dangerous but still fascinating.