When an unusually high number of people with serious eye injuries showed up at an emergency department one morning, health officials started an investigation to find out what had gone wrong the night before at the Florida nightclub that the injured people all reported visiting.
After checking with the neighboring hospitals, researchers found and examined 56 people who had developed eye problems after attending the club's "foam party" (in which blowers on the ceiling spray soapy foam down onto a dancing crowd) with about 300 other attendees in Naples, Fla., according to the report published by the Centers for Disease Control and Prevention (CDC).