This paper is concerned with a multimodal communicative act, the televised promotion of the 'Athens 2004 Olympic Games' on National Hellenic televisión. The first aim of the paper is to show that the commercial examined constitutes a "multimodal metaphor" (Forceville, 2004 and through which the audience is essentially invited to interpret the 'Athens 2004 Olympic Games' in terms of a 'festival'. The second aim of the paper is to explain how it is that a commercial such as this one, which foregrounds entertainment and celebrations, is almost unanimously received by a multicultural audience as successñilly advertising the Athens 2004 Olympic Games. In the framework of Relevance Theory, the pragmatic and cognitive benefits of the specific multimodal metaphor are discussed in terms of positive cognitive effects and processing effort Wilson, 1986/1995;Wilson and Sperber, 2004). Experimental evidence on native and non-native audiences' reaction to this televised promo suggests that the intended interpretation is recovered in terms of a range ofstrongly implicated assumptions that viewers unanimously reckon, rather than in terms of a range of weak implicatures (Forceville, 1996). Drawing onthe Cognitive and Communicative Principies of Relevance and the key concept of Optimal relevance, the paradoxical finding of 'irrelevant scenes' contributing to a fruitful interpretation process and recovery of 'relevant meaning(s)' is explained.