This has been doing the rounds for a while now, but was a very good PR stunt for carpet cleaners.
The down side was that the guy cleaning the carpets was using a machine that many of us "serious" carpet cleaner would class as a toy. Therefore, many will still believe that they can get good results from the machines that they can hire at the local supermarkets.

It is just a shame that they did not use a truckmount or high end portable, that water would have been black.