An excerpt of Michael Jackson rehearsing Thriller's "Human Nature" during preparations of his "This Is It" tour has been posted on the official YouTube page for the upcoming "This Is It" documentary.

Previously the trailer for the Michael Jackson film premiered at the MTV Video Music Awards.

The "Human Nature" clip proves how involved Jackson was in the staging of the This Is It show while he is choreographing his own moves. It's also impressive to hear Michael's voice shine in the clip, further negating reports that the singer was "frail and listless" at rehearsals in the weeks before his death on June 25th.

The film "This Is It", directed by Kenny Ortega, will only have a two-week limited run in movie theaters. A DVD of the film is expected later in the year. The

"This Is It" soundtrack will also reportedly feature a new Michael Jackson song.

(CRI/Agencies September 22, 2009)