Golden Retriever on a tredmill

Golden Retriever on Tredmill

I was reviewing some of the videos I've posted on youtube today, and I stumbled across this interesting video about another golden retriever trying to run on a tredmill:

Personally, I've never tried this with my dog (I also have a golden retriever), but I'd be tempted to see how he does on the tredmill.  By the way, the dog seemed to be struggling a bit (probably since the belt was moving rather fast).  So what do you think about this video?