This episode is named Vantablack, for a museum exhibit that represents Toby's mood. Vantablack (vertically aligned nanotube arrays) is a real material that absorbs up to 99.965% of visible light and is described as "the world's darkest material." Records do not indicate that the American Museum of Natural History (AMNH) in New York City ever had a Vantablack exhibit, but there has been a Vantablack exhibit at the Science Museum in London.