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.
If you do then look in the crop,neck, intestines and organs ect