Forgetomori posted this video of the George Foreman and Muhammad Ali fight from 1974. He notes that during one second of the video (between 5:45 and 5:46) something that looks like the head of Michael Jackson, circa 2000, appears.
It could be a hoax, a bizarre face added digitally and recently to the scene, as what we assume would be the black hair around the face is actually transparent.
On the other hand, there are some things that interact with the image – passing both in front and behind the "face" – which suggest that it was not such a bad editing job. And also suggest that perhaps it's not a hoax, but pareidolia. Even if I have no idea of what could have looked like a face with glowing eyes. Certainly the height of that face is not right, it's at the height of everyone else's waists. Perhaps a bag? I don't know.
If you don't want to wait for the video to load, visit Forgetomori's blog, where he has an animated GIF of the relevant section.
Michael Jackson face appears in Muhammed Ali video: hoax or pareidolia?
