Cool Shades (1968, part II)

It’s Hell on Earth out there—you killing demons killing hippies killing everyone. Through all the bloodshed, you find a discarded pair of John Lennon-type sunglasses. There are cracks in the lenses, but you can still see.
Demons approach from behind, further away than you can see with the naked eye. Cocking your .45, you spin around to face the fiends. They’re still quite distant. But you’ll be ready.
There’s something about these sunglasses. They show you what’s coming to kill you next. Night is falling over the city, but you won’t be taking the shades off any time soon.