Abstract Why do some happenings become incentives for cultural or political transformation (that is: turn into events), whereas others remain ordinary occurrences? The theoretical perspectives of cultural repertoires, cleavage structures, and discursive opportunities are prominent and fruitful approaches for explaining cultural or political behavior and attitudes, yet they do not have a satisfactory answer to this question. To fill in this gap, I introduce a typology that indicates how certain happenings merely reproduce existing trends, whereas other ones turn into motives to change them. This can be either because they are “focus events,” which confirm dominant cultural or political patterns, or because they are “shock events,” which form a break from them. I illustrate this typology by investigating the distinct meanings that 9/11 were accorded in the American and Dutch public spheres. This analysis shows that this happening became a “shock event” on the issue of safety in the American case, as it broke with the cultural repertoire of viewing the United States as a safe, militarily impenetrable nation. In contrast, 9/11 turned into a “focus event” concerning the issue of Islam in the Dutch case because it confirmed the discursive opportunities to problematize Muslims, which public actors in the Netherlands had already developed in the years leading up to 2001.