Daredevil Gustavo Guimarães walking on a highline crossing before his death

On July 25, daredevil highliner Gustavo Guimarães fell 165 feet to his death at Usina Waterfall in Alto Paraíso de Goiás in Brazil. Those who practice the sport walk across a slackline often suspended at dizzying heights and usually between cliffs, mountains, or buildings. Even though he was wearing a safety harness, it was later discovered that it had not been clipped in. According to police, two possibilities may have contributed to the tragedy - either he forgot to attach the leash to his harness, or it came undone by itself. The 29-year-old had already walked across the highline, but disaster struck while he was on his way back.