Dan Castellaneta, the voice of Homer Simpson since 1987, guest starred on a 1992 episode of L.A. Law entitled "L.A. Lawless." In this episode, Castellaneta starred as a theme-park employee who was fired from his gig as Homer Simpson because he removed his Homer Simpson head while on the job. The result is some pretty amazing footage of Castellaneta voicing Homer Simpson while in a Homer costume.
That episode, by the way, was set on April 29, 1992. If that date sounds familiar to you, it might be because you remember the Sublime song April 29, 1992, named for the first day of the Los Angels riots following the acquittal of four white Los Angeles policemen on all but one charge (on which the jury was deadlocked) connected with the severe beating of Rodney King.
Fun fact: The Sublime song is titled April 29, 1992 (Miami) but you can clearly hear Bradley Nowell singing "April 26, 1992". Apparently he just screwed up and they kept it because it was such a great take.