A sky full of stones
To this day nobody knows why showers of rocks fell on the town of Chico, California. The rocks fell for four months and then stopped.
https://cdnc.ucr.edu/?a=d&d=MM19220314.2.8
No one knows where the stones came from, or why Chico was their target. It is said that someone called “The Ghost” wrote in to the local newspaper to take credit for the rock showers. He or she has never been identified.
There’s a One Step Beyond episode that gets into this (https://www.imdb.com/title/tt0507859/). But not very far. The trail dries up pretty quickly.
There’s still so much we do not know.