Look at what I caught on a big plastic work hook. Has this happened to anyone else?

Look like you snagged a fish.

Yes, I have snagged a largemouth bass on Lake Anna.\ with a crankbait.

Also snagged a bluegill in a pond on a crankbait.

I believe they were going after the baits, missed them, and the hooks caught them as they tried to swim away.

Snagged hundreds of shad, especially this time of year and winter when they're really schooled up. Not sure how you did it on a plastic worm though.

The worm has been pulled down from a larger fish strike, your delayed hook set may have snagged the Shad or the Shad was in the basses mouth when you missed the hook set.

Tom