Yep, Jacko played a part in the songs history. A guy called Chris Mosdell wrote the original lyrics,as he did for most of Yellow Magic Orchestra's stuff. Sakamoto composed it. Greg Phillinganes was a session musician on 'Thriller', Jackson wrote an extra verse or two and the song was recorded but never used. Philliganes got permission to release it as a single of his own,and later,when playing keyboards with Clapton,introduced him to the song and it appeared on Clapton's August album. A few bands have covered it, The Human League did one. I'm a fan of Sakamoto's music,so that's the one for me. I'm sure the Thriller-era Jackson version would have been worth hearing though!