Shawn and Marlon's latest scheme becomes a hair-raising nightmare when they take over the manufacture and marketing of a grooming product called ""Goop, Hair-It-Is."" While Marlon comes up with a concoction that makes his hair look great, Shawn decides to sell the hair goop on an infomercial. They shoot the infomercial live, with Gary Coleman acting as a celebrity spokesperson. While Gary is doing his pitch for ""Goop, Hair-It-Is,"" the chemicals from the product cause his hair to catch fire. Shawn and Marlon's dreams of becoming successful entrepreneurs also go down in flames.