(Time to instantly think of something on the spot because it never occurred to me!)
Gold was helping Chica make night snacks. He jumped when you turned on the camera to ask him if he could show you around since this is the first time you set foot in the building, and the extreme darkness did not help. He dropped the flour onto his legs, which you can't tell, but the flour is still stuck to him, so he's leaving footprints everywhere, but no one else would clean it for him, plus he has to find a way to clean himself. All in all, your character hates the darkness, and Gold is pretty annoyed. Not with your character, specifically, but the events that happened and the consequences that go with it.