Since San Francisco Sheriff Ross Mirkarimi apparently didn't get an invite to tomorrow's anti-domestic violence flash mob on the steps of City Hall, the noted arm-bruiser will be holding his very own flash mob to speak out against domestic violence — with San Francisco county inmates.

According to the Chronicle's Matier and Ross, prisoners and prison staffers at the County jail in San Bruno have all been hard at work practicing their dance moves to the five-minute "Break The Chain" anthem in preparation for tomorrow's stunt. The prison event claims to be part of the official One Billion Rising campaign in which women are asked to "walk out, DANCE, RISE UP, and DEMAND an end to this violence." Of course, most of those inmates are men and they can't exactly walk right out of the county lockup, much less "RISE UP." [Note: see update below]

For his part though, Mirkarimi remains as cluelessly stoked as ever: “I’m pretty excited about this,” Mirkarimi told the Chronicle. “We are the only sheriff’s department in the state or country doing this.”

The department isn't the first to hold an inmate flash mob, however. In 2007, inmates at a maximum security prison in the Philippines were forced to put on a production of "Thriller," causing some to claim cruel and unusual punishment. Others wondered if it still counts as a flash mob when it's mandatory for everyone.

Update: KTVU clarifies some of Matier & Ross' points: Apparently the dance party is happening at both the men's jail in San Bruno and the women's jail on Seventh Street and participation is reportedly voluntary. The founder of Dancing Without Borders, who helped coordinate the dance, told the news channel, "Being incarcerated can be very isolating and disempowering. By dancing, inmates find an opportunity for personal healing and an invitation to rise as part of a global healing movement to stop violence and oppression."

Previously: Women To Dance, Demand End To Violence On V-Day At City Hall, Dolores Park
All Ross Mirkarimi coverage on SFist