"Self Destruction" was a 1989 posse cut one-off that did what it could to curb gang violence in the black community. At the time, the song felt historic, since heavyweights like Public Enemy, Boogie Down Productions, Kool Moe Dee, and MC Lyte had never been on the same song before. And this weekend, many of those original rappers will perform the song in Selma, Alabama, at a BET-sponsored concert that commemorates the 50th anniversary of Martin Luther King's Selma march. Also, Vanilla Ice will be there. No, it doesn't make any sense.