My first thought was, "Only in America can we turn a fallen rock into an opportunity!" Of course it's free! It came right off that mountain you're living next to. And now it's blocking your driveway! Besides the fact that it probably is humanly impossible to lift without heavy machinery, how would one actually "claim" this free rock? But we Americans are suckers for anything FREE! I can just imagine a man's conversation with his wife as they drive by and read the sign. Imagine how beautiful that would look in the front yard next to the duck pond....
Only in America.