In a special homage to pop music icon Michael Jackson, tens of thousands of dancers around the world gathered simultaneously in public places to perform the steps of the legendary music video "Thriller." In Portland's Pioneer Courthouse Square, a crowd of about 160 zombies and werewolves spontaneously started their synchronized routine at 5:20 p.m. Saturday, Oct. 24. Front to back, brothers Kiaun, 8, Jamane,6, and Carter Smith, 8; with zombie dancer Alisha Holland, were part of the zombie mob that invaded the square, then watched the Thriller zombies perform. The annual "Thrill the World" event has spawned its own community of Jackson enthusiasts that has built over many years – but the 2009 event has been viewed as the biggest ever held.