While he's still the same as before and can even use his stand, he's no longer capable of healing, and he slowly decays over the course of the story until his body finally fails him.
The inital zombies created had pointless records attached and were nothing but mindlessly stumbling around bodies that ate living people. The cinematic record of a person's life ends with their death, but by attaching a new cinematic record to that end would reanimate the corpse.
He drag himself out of the heap, pipes sticking through his chest in several places, and explains that the shelf was broken, the load was too heavy, and he should have been paying attention.
Four had a forklift driver crushed/impaled by a load of pipes because he backed into a shelf while chatting with his coworker.She explains that the ladder should have been replaced, she knew better than to over-reach, and she should have had a spotter. When she gets up, her face is slashed to ribbons.
Installments 3-5 of the nightmare-tastic Canadian workplace safety PSA series "There Are No Accidents" (1 and 2 had Final Destination-style precognition, and 6 had a last-second rescue) have people killed in a workplace incident coming back to life upon hearing the word "accident" and explaining why it was no such thing.