Fans moonwalked to the Century Stadium on Ethan Way for the very first showing of "This is it," Tuesday. Nearly 100 people wrapped around the theater in anticipation for the never-before-seen footage of Michael Jackson's rehearsals from what would have been his final 50-city tour. "You will never believe where I am at right now," echoed fans on cellphones as they stood in line. "I am about to see the Michael Jackson movie, it's the last one." Jackson's music played outside of the theater from the KSFM 102.5 van while fans of all ages sang and danced. As "Thriller" blared, fans teared, demonstrating the enormous impact that the "King of Pop" had on entire communities and generations. "I