A seemingly impromptu number in Chinatown in London.
FROM their seats on the rumbling London Underground, a group of stony-faced passengers rose at random and burst into the jerky slide kick of a zombie dance before melting away without a word.
The response of British passengers — stiff gazes, nervous silence and tepid applause — was, naturally, videotaped and posted online, and it quickly spun off into zombie dance sequels at the central Copenhagen train station, in Chinatown in London and on the street outside the Sydney Opera House.
A commemorative "Thriller" album, which contains original music and remixes with Kanye West and Fergie, is faring better in Europe and Asia than in the United States. In France, it has been the top-selling album for the last three weeks.
Sony BMG undertook the campaign in part because of some major hurdles to a traditional approach. Mr. Jackson is not only somewhat tarnished, but also reclusive. The solution was an unconventional strategy that has attracted news coverage as well as controversy over when a soft corporate sell should be disclosed.
In Britain, Sony BMG executives videotaped professional dancers in everyday settings — like the Tube and a Tesco supermarket. The results had a gritty street reality that mirrored amateur tributes like the video made in a Filipino prison, where more than a 1,000 orange-suited inmates performed "Thriller" as their daily exercise. That clip has been viewed more 11 million times on YouTube, about twice as many times as Mr. Jackson's original version on that site.
But critics remain wary of the hazy line between guerrilla and "shill" marketing, an industry term for pitches whose source is not disclosed.
In Copenhagen, professional dancers made a surprise appearance in the middle of a busy train terminal, milling among other passengers in bulky winter coats and knit hats. When the first notes of "Thriller" echoed through the station, the dancers merged toward each other, jerking into zombie mode, right down to Mr. Jackson's signature hip grinding moves. When the dance finished, they sauntered away wordlessly, leaving behind a space in the crowd and flustered passengers who seemed frozen in place.
Their dance was featured on national Danish television and posted on YouTube. Fritz Wehner, a dance teacher who organized the group of about a dozen dancers, said he wanted to do it as a tribute and contacted Sony BMG, which supported the group.
The effort is part of the continuing quest to reach consumers without turning them off. Sony BMG executives said the strategy was successful with younger fans, a factor in the sales of "Thriller." "It's all about engaging the consumers," said John Ingrassia, the Sony BMG commercial music group president.