flash mob

Offbeat
2:22 pm
Tue April 19, 2011

Graduation "Flash Mob" on the University of Michigan's Diag

The "mob" builds on the front steps of the Hatcher Graduate Library at the University of Michigan.
screen grab of YouTube video

flash mob - n - a group of people who organize on the Internet and then quickly assemble in a public place, do something bizarre, and disperse; also called inexplicable mob

Cindy Heflin at AnnArbor.com spotted this one - a "flash mob" performance on the University of Michigan's Diag:

The performance was coordinated by students and sponsored by online graduation announcement company GoEnnounce.com.

About 70 students danced to Rusted Roots' "Send me on my way," GoEnnounce said in an e-mail...The performance was choreographed by Erik Heitz, a musical theater major.

Hard to say whether 70 dancers constitutes a "mob" - which according to Websters is a crowd "bent on riotous or destructive action."

Seems more like a "flash dance" to me, but that name's been taken.