The Lluís Companys promenade was packed with thousands of youths, mostly aged 12 to 18, responding to a viral call to see therians—individuals who identify as animals. The meeting proved to be a hoax, causing frustration and tension among those hoping to record content for TikTok.

The afternoon was characterized by stampedes and shoving as crowds tried to spot the alleged therians, finding only people in costumes or agitators. The event was also used by political groups to spread messages, with some attendees carrying Spanish flags and shouting slogans against the Government.

Around 8:30 PM, police moved in to clear the Arc de Triomf area. The operation led to clashes and objects being thrown at officers, resulting in five arrests. Similar incidents were reported this weekend in cities such as Valladolid, Bilbao, and A Coruña.