Medics rushed onto the set of "America's Best Dance Crew" yesterday when poppin' and lockin' suddenly turned into passin' the hell out.


TMZ has leared Cara Petrunich -- a member of the Dynamic Edition dance crew -- fainted during a break in production yesterday. We're told the on-site medic immediately rushed to the scene and supplied Cara with water and oxygen.

The story has a happy ending -- Cara quickly recovered and was able to dance with her peeps on the show later that afternoon.