In the popular imagination, balloons often represent freedom and joy. But as every adult knows, a profound disillusionment accompanies the release of a balloon as a child—namely, that what goes up must come down, and often with a loud pop.

And so it went with the 1.5 million balloons that were released in September 1986 over the city of Cleveland. The United Way of Greater Cleveland, a nonprofit, staged a fundraiser in which it attempted to beat Disneyland’s Guinness World Record for the most balloons released simultaneously. But fate intervened, and the result was both more unusual and tragic than anyone could have imagined.

Nathan Truesdell’s short documentary Balloonfest depicts the helium-filled spectacle using archival news footage from local television stations. When the balloons are first released, they form a mass of colorful orbs that wraps around Cleveland’s Terminal Tower, by turns resembling a meteorological phenomenon, a mushroom cloud, and a locust infestation. The image is both awe-inspiring and haunting.

The film’s mounting sense of dread prepares us for what happens next: The balloons are promptly brought down by an approaching storm. They wreak havoc on the city, litter Lake Erie, and, tragically, impede a Coast Guard search-and-rescue mission for two missing fishermen. Balloonfest serves as a sobering reminder of the shortsightedness of humankind.