At least seven people were killed and dozens more injured Saturday when a cliff fractured in Sul Minas, Brazil, sending rocks crashing onto three speedboats below. The horrifying moment in the Capitólio Canyons was captured on video as boats attempt to speed away but were engulfed beneath the falling debris and surging water. A spokesperson for the Minas Gerais Fire Department told The Washington Post authorities were looking for at least 20 people thought to be missing after the disaster. The destination is a popular tourist attraction, as the Rio Grande river snakes through the canyons, offering boaters scenic views of the towering cliffs.