Of course it's funny to joke about it, and it still totally serves him right if this really was some evil bastard, but what if this was some poor asshole with mental problems? Maybe he never intended to hurt the child. It's easy to say now, I realize that, but there's a possibility and it does add a potential tragic twist to the story.
So yeah, maybe something to consider when gloating about his brains getting scrambled.
If it's evil brains it's all good. It's just that we're not gonna know.