My favorite was a crossover with another product: Trix cereal. This nerdy looking guy buys a box of Trix and the lady at the checkout counter teases him with the line "trix are for kids" and he sneers at her. Goes home and exclaims, "Finally! after all those years of Trix are for kids, Trix are for kids!" He pulls a zipper from behind his head and the animated Trix Rabbit is standing there in front of the bowl of Trix cereal, "Today, Trix are for Rabbits!" and he pours milk into the bowl, but only one drop comes out. He looks at the empty carton with a totally dejected expression and the slogan "Got Milk?" comes up.