Popular app, TikTok (Photo Illustration: Drew Angerer/Getty Images)

What started as a massive inside joke for TikTok teens led to a weekend of absurd shenanigans and arrests in California. The party, originally posted to TikTok as a meetup called “Adrian’s Kickback” by user adrian.lopez517, was intended to have people “pop out n celebrate my bday.” The post went viral throughout the week, generating a hashtag that was viewed more than 203 million times on the app. All weekend long teens made videos ranging from how they planned to ask their parents to let them attend the rager or how they were getting there. Celebrities and popular TikTokers even made content signifying they were attending the supposed party. “We are actively monitoring multiple social media posts advertising a large gathering on the beach this weekend,” police tweeted Friday. “The safety & well-being of our residents, visitors, businesses & motorists is paramount, which is why the Huntington Beach Police Department is taking significant steps to prepare for the potential influx of visitors, including working closely with our regional public safety partners.

Gatherings formed Friday and Saturday in Huntington Beach, near Los Angeles, with about 2,500 people in attendance. Police were forced to disperse crowds both nights. What started off as a birthday celebration turned into massive gatherings over the weekend in Huntington Beach, California, requiring police to break up the parties and leading to nearly 150 arrests, officials said. Huntington Beach Police Department arrested 121 adults and 28 juveniles Saturday night. The charges included vandalism, firing dangerous/illegal fireworks, failure to disperse and curfew violations, NBC Los Angeles reported. No major injuries were reported, but paramedics were on call to deal with any medical issues.

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Videos from the gathering showed crowds of young people dancing and running through the streets, climbing on stoplights, lifeguard towers, and police cars and setting off fireworks in an intersection and on the beach. Now post-what some are referring to as a “Project X” level party, is the conversation surrounding how powerful the popular app is.