From the fireman side, an engineer waves to the camera from the cab of his Phase IV locomotive as Amtrak's Southwest Chief prepares to knock down a semaphore signal located in Chapelle, NM.
Just that: to put on a smile, while watching our favorite thing: railroading.
It could be anything, from the people around railroading, to a funny perspective, or just a 'jokingly' grimacing locomotive.
I hope you all have fun with this. :)