A search for "Samuel Downing cemetery" did not produce a photo of Samuel's stone which I know is online in several places but it did produce much of the same results as the Robert Downing search.
I searched for my name and got pictures of me and people with the same name.
Needless to say there are many other photos produced in a search that appear to have no connection to what I searched for. It also produced some of the graphics on my blogs and web pages such as the Geneabloggers logo on this page.
If you are looking for that elusive stone, maybe a historical spot, a town, whatever, it is worth a look to see what is online.