I've seen many people type "google" or "google.com" into google's search bar, while on google.com. Then they typed "facebook.com" into the search bar or something silly like that ...
I don't know where I heard this, but I was told that its very common for inexperienced internet users (of which there are many) to search for google in the search bar built into their browser, then click google to search for there.
My parents do that all the time. Often then typing the URL they wanted originally (and knew) in the google.com search bar after.