Glass, by James R. Benn

 "Glass," by James R. Benn, in Alfred Hitchcock's Mystery Magazine, September/October 2021.

One of the many reasons AHMM is my favorite magazine is that they occasionally take a chance on a crime-related story from a different genre.  This story, for example, has a clear science fiction orientation.

The proton moved an at insane speed.  If it had been capable of fear, it would have been terrified.  Contained within an oval tube, traveling just short of the speed of light, it whipped around the 54.1-mile circuit ceaselessly as other protons shout past it from the opposite direction.  Collisions sparked all around it, sending smashed protons against the smooth metalic surface which contained its universe.

 That's the start.  We follow the path of this proton for an entire page before things go awry. The superconducting super-collider goes boom and a piece of 21st-century technology is blasted back through time to 1965 where it is discovered by hapless recently-fired salesman Guy Tupper.  Guy brings it to his cousin Jerry who runs a repair shop.  Together they figure out just enough to get the device working, and then...

Well.  That would be telling.

There is a clever roman a clef here, with a well-known writer being referenced under a transparent pseudonym.  The best part is that the plots of his novels fit spookily to the situation Guy and Jerry find themselves in.

There is a twist in this tale that made me gasp audibly.  That doesn't happen very often.