They say so-called flash mobs are sneaking into apartment buildings at night, taking over community rooms by partying and causing damage.

MILWAUKEE - Milwaukee police said a large flash mob filled a parking lot near 103rd and Silver Spring Monday night, April 10, with more than 200 cars loitering, blasting music and doing spinouts.

It was a cringey as you could imagine, and the memes instantly sprouted up from the internet in reaction to this absolutely bizarre golf flash mob extravaganza. You'll have to see how this thing goes.

Another category — "flash mob" thefts or smash-and-grabs — can prove especially tricky to stop. The thieves strike in such large numbers that an individual store employee or security guard may ...

The roughly 20 dancers who took part in the flash mob are all amateurs. The group sported matching red shirts. “The fun thing is that everyone is at different levels,” said Mané.

Over the weekend, a Nordstrom in a Los Angeles mall was a repeat target for a "flash mob" robbery. Up to $100,000 of merchandise was stolen, days after a similar robbery in the Los Angeles area.

It must’ve been very cool to be part of a moment like this. Kelly Clarkson surprised people at a Blue Bottle Coffee shop in Los Angeles by serenading them with the help of flash mob on the floor ...

"We always had this vision of, ‘I want to flash mob businesses, and we want to go buy all everything off the shelves.’ So I said, Hey, we got to bring this to Atlanta.