In many respects the Lay's Potato Chip commercial is quite similar to Doritos in that it uses a highly visual celebrity in Michael J. Fox, there is early product identification, and it employs humor. But in one critical aspect it differs significantly: instead of building the story around the celebrity's involvement with the product, it introduces what becomes a very arresting topic of getting or avoiding a speeding ticket, as supported by the fascinating use of the Trooper's radar speed-gun. Interest focused on that, the celebrity's involvement with the product was passive, and the result was that recall was only about average for a commercial and a little more that half the level of Doritos. This is a classic example of where a subsidiary element meant to enhance interest or attention crosses that dangerous but invisible line and becomes competing interest so that it actually takes away attention from the sales story. In its favor, however, the commercial's persuasion level, which relied on the Trooper's obvious enthusiasm in eating the potato chips, was 59% above average, and this pulled up its overall performance to a very satisfactory 48% above norm. Nevertheless, with no specific reason given for either Fox's nor the Trooper's enthusiasm (as opposed to Doritos' strong new cheese flavor), the commercial was only 42% as effective as Doritos' super performance.