MANKATO September 10, 2012 (KMOK)  -- Viewers of Saturday night's Michael Jackson tribute show got a "thrill" when a flash mob broke out.

Organizers say the flash mob to the song "Thriller" was the idea of a St. Peter business.

They were able to pull off the surprise by sneaking in the dancers down an alley and across a parking lot as they emerged from under the stage

WATCH -- The video of the flash mob