it amalyses you

Small (settling himself into bed): "Mummy, you shouldn't eat berries on trees, they're not good for you."
Me: "Oh yeah? Why's that then?"
Small: "Because it will amalyse you. When you eat it something happens to your body and you can't move."
Me: "Ahh, you mean like on Ice Age, when Sid ate that red berry?"
Small: "Yeah, it amalyses you, so you should never eat them because that's bad."

Well, he's not wrong!