Nami's reply to Noel is lost in that scream. Oh, god. Here we go. She stops herself from slapping a palm to her face if only because she'll ruin the hours of work she's done on it.

"Luffy, I don't think it's real."

She hopes it's not. But other people are eating and they're not freaking out, so either it's not real or the three of them are the only sane ones in a terrarium of cannibals.

...sane by comparison, anyway.