While Earth Song, MITM, KTF, HTW, and Cry all tug at some emotional part of me, Will You Be There puts a lump in my throat and tears in my eyes everytime.
I can envision in my mind the scene from Free Willy where the whale finally is able to leap to his freedom and the young boy standing there encouraging him on; so moving to me I can't even think about it without tearing up. Michael, that song, and the emotional impact of the scene in the movie will always be affixed in mind.