Flash mobs have become a pop culture phenomenon.
YouTube is flooded with videos of people spontaneously bursting into song or dance in groups.
Now, California resident Mike Abarca is capitalizing on the flash mob trend to give back to his community.
Every week he picks a local establishment to patronize for "flash buys."
Abarca uses social media to get the word out in hopes that people will show up and spend money to help keep locally-owned shops afloat during tough economic times.
"I kind of thought, 'Ok I'm not a dancer. I can't do a choreography, but how can I do something like that?'" he recalled. "There's a lot of businesses that are hurting right now due to construction, economy, what not."
"It was just one of those things [to] see if we can call on our community to kind of step forward," Abarca added.
So far, eight businesses have been hit by flash buys.
The businesses are warned when they are chosen as the week's target so they can add staff, food or products as needed.
Some owners have even chosen to offer "Flash Friday" deals.