I'd wager the worm isn't alive.
His crop did feel liquidy after the ordeal, and it was empty before hand. I felt something hard earlier, but I can't confirm if it was his crop or not.
As he was vomitting, I could only describe the event as a seizure.
I lost a beloved pullet months back and the way you described your guy dying, was painfully exact as to my precious girl. It was quite traumatic as i was holding her as this started and she died. I couldn't make myself do a home necropsy on her and the lab wouldn't let me send her body to them, even though i stored her body correctly. I did end up having to treat her flock for coccidiosis after her passing, as i found blood in the stool of her flockmates. I thought she was egg bound initially but eventually figured out that she wasn't. I'm so sorry. My heart goes out to you.