UFC’s Brunno Ferreira filled a cup with sweat and this fan actually drank it

The world of mixed martial arts has never been short on moments, but what transpired recently at a UFC event may have just raised the bar for strange fan interactions.

UFC middleweight Brunno Ferreira, who is currently cutting weight to face Marvin Vettori at UFC 323, found himself at the center of a viral moment when video footage emerged showing the Brazilian MMA star collecting what appeared to be perspiration into a cup for a fan. The clip, which quickly circulated across social media platforms, shows an enthusiastic supporter preparing to consume the contents while onlookers counted down and cheered.

“Let’s do it,”

someone can be heard saying in the video as the fan prepares for the unusual challenge.

“Secret drinks, let’s go baby!”

another voice exclaims. The crowd’s reaction suggests this was treated as some kind of dare or competition, with participants celebrating afterward, calling out

“You’re the big champ, yo!”

However, the authenticity of the stunt has come under intense scrutiny from eagle-eyed viewers online. Multiple observers pointed out apparent inconsistencies in the video footage, noting that the liquid’s appearance changes dramatically between cuts. Initially appearing cloudy and foam-like, the substance suddenly becomes clear in subsequent frames. Some viewers claim to have spotted the cup being switched out in the background, visible in a mirror reflection during the video. The sudden transformation from an opaque mixture to what looks like ordinary water has led many to conclude the entire spectacle was staged for social media attention.

While some expressed disgust at the concept, others dismissed it as yet another example of people seeking viral fame through outrageous stunts. Several commenters questioned why anyone would participate in such an activity, regardless of whether it was genuine or fabricated.

Ferreira, who will enter the cage at UFC 323 against the ever-physical Marvin Vettori (-116) as a slight underdog (-104), has not publicly addressed the controversy surrounding the video or confirmed whether the contents were authentic. The bout itself has potential, with Vettori (19-9-1) bringing a combination of striking (4.68 significant strikes landed per minute), submission expertise (9 career submissions), and never having been stopped in his career. Ferreira (14-2), meanwhile, carries a dangerous finishing ability with 13 career stoppages, 9 by knockout. The two MMA stars, both in their physical primes, are expected to go to war when they clash on the UFC 323 card, headlined by Dvalishvili vs. Yan 2.

This isn’t the first time UFC athletes have been involved in unconventional fan interactions, though this particular incident has generated significant debate about the lengths people will go to for internet notoriety.