I saw this pointed out on Tumblr, and to be honest, I like it, but it's so sad.
When Law said he'd put the guy on the ground back, he didn't mean he'd fix him up. He's dead already, Law substituted himself with someone who was already a corpse. Law's words to him were he'd put him back, as in, he'd return the corpse where it was supposed to be. But why would Law do this? Because Corazon, the citizens of Flevance, they never got burials, proper ones at least. Even the chest that Corazon was leaning against was yanked from under him, and he was left there. So, Law's desire to put this corpse back properly could be some brutal but poignant insight to Law's character from Oda, and I love it.