not necessarily more gore, just more of a reaction. If something dead was in front of you, you would react. You might not react negatively (though I'd hope most people would) but the idea of just 'taking out the trash' was a little to rushed. At the same time he knows that he did it (well the voice does) so he already knows what he'd plan (the neighbors aren't watching, coincidence? No he checked first, etc.)
He's technically two people for the scene, so imagine two people at the scene.
One of them is freaking out, the other one keeps cool and gives instructions.
From first person this could be as far as the narrator being in tears over the whole ordeal and yet still doing exactly what the voice says because there really is no alternative.
In the form of a simile: It's like being thrown down rapid water. No matter how much you thrash at the waves or scream or cry, eventually you'll go exactly where the river takes you.
I look forward to an updated version of both