Revelers drank copious quantities of alcohol. As the small country town's resources became depleted, the amiable mood began to turn ugly and Zap's residents asked the visitors to leave. Some complied, but others stayed behind. The event became a full-fledged riot. The National Guard was called in and the crowd was dispersed. The Zip to Zap became the first (and to date only) official riot in North Dakota that had to be put down by the National Guard.
