Alyth Yard Hump In Action On YouTube

I found this video on YouTube of the Hump Train in action at Alyth Yard in Calgary. I found pretty interesting to see how this is done.
Alyth Yard, Classification Hump

I also found one of a hump yard retarder in action. I'm not sure where it is located though, but still interesting.
Railroad hump yard, master retarder in action

The links will take to the owners YouTube page. I'm sure you know how to make your way back to here later on. :)

Cheers,