Ever since humanity first got the idea to travel into space, plenty of people have been legitimately terrified of what might be waiting for us beyond the stars. As sci-fi author Arthur C. Clarke once commented: "Two possibilities exist; either we are alone in the universe, or we are not. Both are equally terrifying."
The concept of aliens visiting us has instilled fascination and fear in people for decades now, and shows no sign of stopping anytime soon. Orson Welles's famous War of the Worlds radio play (based on the H.G. Wells novel) made people legitimately panic for fear of an imminent alien attack, while the post-nuclear age had us all watching the skies.
Since then, there have been countless stories of people who have claimed to either have seen aliens, interacted with them, or in some especially weird cases, been attacked and abducted by them. While a lot of these stories are pretty out there and very likely not true, it's not hard to imagine that maybe we actually have been visited by some alien life that might in fact be hostile to us.
As it turns out, one man in Arizona is pretty convinced that he's been a regular target of alien attacks; so much so that he's trying to sell off his property for a HUGE amount of money.