human
Subaru:  He hit his head, hit it and hit it, but he couldn’t overcome the pain. A hellish bed of thorns had sprouted inside his skull, and he rolled around on the sand, writhing in agony, biting down on the sand inexplicably.
gpt
Subaru:  "Owww! Argh! It hurts! It hurtsss!” He screamed until he was almost spitting up blood.
human
Subaru:  There was a massive amount of sand in his mouth, and he was grinding it between his teeth as he writhed, swallowing it to try to stave off the inexplicable pain. He couldn’t resist it, though. He was losing to it. Naturally, of course, his Invisible Providence disappeared immediately.