Prancercise exercise video goes viral

Got the moves like Mr. Ed  -- then you're ready to Prancercise.This workout is based on the movements a horse might make.

Johanna Roarback invented her brand of exercise in 1989 and it never caught on. But thanks to youtube, her goofy work out is going viral.

Check it out for yourself - here's the video. And there's a book!