Based on interviews with 104 young partygoers, this article examines sexual assaults that occur in the context of festive events. Focus is on how individuals describe their sexual victimization. Three experiential characteristics stand out in the victims’ accounts. First, the assaults are described as being characterized by an altered state of consciousness, primarily alcohol-related intoxication. Second, the assaults are described as involving a sense of losing control. Third, the assaults are described as antagonistic, with one side using force to achieve domination. Drawing on Durkheimian theory, the article introduces the sensitizing concept of ‘sexually violent effervescence’ to clarify how victims experience sexual assaults.