21-year-old Maria Eduarda Rodrigues de Freitas posted a cheerful, smiling video just moments before her fatal 40-meter fall, completely trusting that her safety harness was properly secured.

The chilling footage shows the young woman happily looking at the camera, entirely unaware of the frantic—and ultimately fatal—preparations happening behind her.

Seconds later, a devastating operational error allegedly caused her to fall without a safety line, cutting her life short in an unimaginable tragedy that has shocked the internet.

Read the full details and context of the case in the comments below!