TikTok users and fans of Korean pop music groups claimed to have registered potentially hundreds of thousands of tickets for Trump’s campaign rally as a prank. After @TeamTrump tweeted asking supporters to register for free tickets using their phones on June 11, K-pop fan accounts began sharing the information with followers, encouraging them to register for the rally — and then not show.

The trend quickly spread on TikTok, where videos with millions of views instructed viewers to do the same, as CNN reported on Tuesday. “Oh no, I signed up for a Trump rally, and I can’t go,” one woman joked, along with a fake cough, in a TikTok posted on June 15…

“It spread mostly through Alt TikTok — we kept it on the quiet side where people do pranks and a lot of activism,” said the YouTuber Elijah Daniel, 26, who participated in the campaign. “K-pop Twitter and Alt TikTok have a good alliance where they spread information amongst each other very quickly. They all know the algorithms and how they can boost videos to get where they want.”