What began as a quest for online notoriety ended in unbearable loss. Fourteen-year-old Davi Nunes Moreira of Brazil died after injecting a bizarre homemade concoction—reportedly laced with crushed butterfly wings—into his leg, a move investigators believe was inspired by a social-media “challenge.” His death has jolted parents, teachers, and officials, reminding everyone how quickly a viral trend can turn lethal.

At first, Davi insisted he’d merely hurt himself while playing outside. But when vomiting, severe pain, and trouble walking set in, he finally admitted to doctors what he had done. Despite a week of intensive care, he succumbed to complications that specialists say may have included a massive embolism, a raging infection, or an acute allergic storm his body could not fight off.

Toxicologists now suspect the butterfly mixture may have contained bio-compounds capable of wrecking tissue or disrupting blood flow. “We still know very little about the chemistry of many insects,” one expert noted, warning that injecting any unvetted substance straight into the bloodstream invites catastrophe.

A full autopsy is under way to pinpoint the exact chain of events that ended the boy’s life. Investigators hope the forensic report will clarify whether toxins, infection, or a cascade of both caused Davi’s organs to fail—and, crucially, will provide evidence strong enough to deter copycats.

Davi’s death is the latest in a growing catalogue of reckless internet stunts. Earlier this year, a Brazilian influencer nearly lost several toes attempting the “ice-and-salt challenge.” Health officials are pleading with teenagers to weigh the real-world stakes before they click “record.” No viral moment, they remind the public, is worth a life.