Pop quiz: what do whipped cream, Nerf footballs, Pizza, and Tempur-Pedic mattresses have in common? That's right — they're all foams. Wait, huh? Pizzas are foams? You mean those annoying, piddly things that chefs were goofing around with in the mid 2000's? That's right, as are hot dog buns, Wonderbread, Pane di Genzano, Portuguese rolls, Naan, pancakes, and pretty much every other leavened batter or dough-based product in the world.