Back in the 1960s, when adults were still under the delusion that children loved clowns, Post advertised their Sugar Rice Krinkles with a clown apparently named Ka-rinkle. The stuff that fueled our nightmares. For another dose of surreal advertising, see the first Ronald McDonald ad.
-via Laughing Squid
Klaus Nomi--funny one.
I truly was expecting the jingle I remember that was used to advertise that cereal. "You will have a circus eating Krinkles..." and so on.