CBS Evening News honcho Rick Kaplan surprised his staff with an afternoon version, of morning calisthenics today. Kaplan arranged for a team of professional dancers to teach the Evening News staffers the moves to the Michael Jackson "Thriller" video.

The Friday fiesta was inspired by this video from a Filipino prison, which has been downloaded more than 4.5 million times on YouTube.

A CBS News insider tells us medical correspondent "Dr. Jon LaPook quickly threw off his jacket to gain full movement of the floor and lead the pack." We're told Kaplan and anchor Katie Couric (not seen in photo) got in on the fun too.