For me it's Dangerous, baring in mind it's function as album closer it fills the role impeccably. I just cannot get over what an incredible way this is to close an album. The album has seriously mellowed down, the track has been preceded by gone too soon, keep the faith, will you be there, and even before then whilst they have more kick to them, still melodic and dark tracks give in to me and who is it. The album could just have finished on an ahhh, we're all warm and gooey inside now after the emotional gone too soon type song, the same way Thriller finishes, or History, which are great for the context they are in also i hasten to add! But no, Dangerous the album finished on Dangerous the song, linking straight back to Jam with the huge synth hits, harsh snare drums and distinctive Riley dangerous era production, making complex and awkward the easy temptation to split the album into too halves of Riley and more traditional MJ in the later half, and forcing the listener to view the 14 track masterpiece as a whole. The intro is eased in by the unusual sound effects to not make the change too jerky from gone too soon, and to seriously rack up the anticipation of the clear mood change that is under occurance. The outro really makes sure the listener gets enough of the groove, they have to feel satisfied something particularly vital as it's closing not only the song, but the entire album. When the last chord is hit, it practically sells History as an advert as the listener is begging for more, and even when this is not the case, it makes you just want to reply back to Jam. He's ended on uptempo's on off the wall and vince, but for me this particular use is the one that nails the concept to the greatest degree, a master ending to a master album.