THere were some shards in mine
that radiated out from the hole. The entire top of the window was gone (all over me, the van, and the pavement). An area of more or less a semicircle of shards that radiated out from the hole was still intact in the window until I touched it, and then it crumbled outward.
I wonder, in retrospect, if the projectile actually ever penetrated or whether the hole in my seat was already there (from children, can you imagine...?) It was a hole about a quarter inch, maybe a bit more. At any rate, the glass itself generally turned to crumbs but not entirely.
Not a day I ever want to relive, that's for sure.