Ung this is going all kinds of bad. I'm guessing Reiner's ability to still scream was because they didn't get his nape? We've seen how Eren's been able to regenerate body parts. They have to sever the brain stem from the cerebral cortex. They know that. Maybe they were too happy to notice their flaw? It could also be a memory triggered as the brain started to die, like a hand twitch from a corpse. Still, this isn't going well at all...
Ung this is going all kinds of bad. I'm guessing Reiner's ability to still scream was because they didn't get his nape? We've seen how Eren's been able to regenerate body parts. They have to sever the brain stem from the cerebral cortex. They know that. Maybe they were too happy to notice their flaw? It could also be a memory triggered as the brain started to die, like a hand twitch from a corpse.
Still, this isn't going well at all...