Anybody Ever Seen This Before?

I’m guessing the chain was really stretched and an extra link bunched up and got caught between the cam gear and the block. Stopping the cam in its tracks. Any signs of that happening?
No, but there was one crank sprocket tooth crammed in between two cam sprocket teeth under the chain. I was able to retrieve all the broken pieces out of the oil pan with a magnet too. I essentially reassembled the crank sprocket so I know I got them all.