They're wondering at forgetomori if a “Michael Jackson” ghost haunted Muhammad Ali and George Foreman during their Rumble in the Jungle back in the wonderful year of 1974.
Michael Jackson's face shows up in the below video at the 5:45~46 mark. It's Michael Jackson circa 2000, not Michael Jackson circa 1974. See for yourself.
If it's not a hoax, they're wondering if it's pareidolia, which Wikipedia tells me is "a psychological phenomenon involving a vague and random stimulus (often an image or sound) being perceived as significant."
The above forgetomori link has an animated gif of Jacko's appearance, but here's a screen cap if you want to save yourself a click.
Ghost, hoax or pareidolia?