ATEEZ’s performance ace San has turned one split-second move into the internet’s new obsession. His “killing part” in title track BAD is blowing up across Instagram Reels and K-pop forums, and instead of staying silent, he is jumping in, reacting to fan covers, and telling everyone to copy the move however they want.
The moment comes from BAD, the Brazilian funk inspired centerpiece of new mini album GOLDEN HOUR : Part.5, released June 26, 2026. The project has already debuted at No. 1 on the Billboard 200, giving ATEEZ a third chart topping album, and San’s viral center move is quickly becoming the face of this era.
The BAD Killing Part That Is Suddenly Everywhere
In K-pop, a “killing part” is the slice of song or choreo designed to be replayed the most, the bit fancams and challenges zoom in on. In BAD, that belongs to San, who takes center in the chorus for a tight sequence that pulls the camera to his face and body line, turning a few seconds into the performance hook.
A post on Korean community Theqoo cutting together that moment from music show stages and fancams kicked off the craze. The thread framed it simply as the ATEEZ San BAD killing part, and comments flooded in calling him “so sexy” and “so f*cking good,” with users saying even friends who “know nothing about idols” were suddenly sending them his clip.
San’s Unfiltered Reaction To The Viral Dance
As the post spread, fans spotted San quietly fueling the trend. He began liking Instagram posts and Reels of people attempting the killing part, from polished dance covers to casual attempts, and, true to his love of cute things, even short Reels of children bouncing along to BAD.
On one fan video he dropped a simple “Hello…?” that sent the creator into instant meltdown in the replies. Then he shared a public message saying he was thankful people were enjoying the dance “in various ways,” that he was grateful no matter what kind of video they posted, and encouraging everyone to “copy it” however they wanted and just “have fun with it.”
That relaxed, zero gatekeeping response is a big reason this San killing part dance viral moment hits so hard. Netizens on Theqoo praised not only how addictive his stage is, but also how he was visibly watching fan uploads in real time, turning a carefully planned highlight into something fans feel free to remix.
From Adrenaline To BAD, San As Killing Part Architect
San’s comfort owning that spotlight has roots in earlier Golden Hour work. For previous mini album GOLDEN HOUR : Part.4 and title track Adrenaline, the members said he directly helped build the choreography, asking for difficult, high impact moves and explaining that he wanted to visualize adrenaline in “extreme situations” like the members hitting their legs at the end of concerts.
With that experience behind him, it makes sense that the BAD era leans on another San driven highlight. By inviting ATINY and casual viewers to interpret his move however they want, he is stretching ATEEZ performance language beyond the stage and into short form video feeds.