Use dance to get in shape and be a part of Thrill the World, the annual worldwide participatory zombie dance event set to Michael Jackson's "Thriller." The event is Oct. 27 at Occidental Park in Seattle. Rehearsals start 4-6 p.m. Sunday and continue 1-3 p.m. Sept. 2, 9, 16, 23 and 30, with dress rehearsal Oct. 20. Rehearsals and participation in the event are free, but donations are encouraged; this year's donations benefit The Lighthouse For The Blind. Rehearsals are at Artspace Hiawatha Lofts, 843 Hiawatha Place S., Seattle (www.seattlethrillers.com).