DVD Extras?

I first caught this movie in it's original cable Tv run, (I guess HBO) way back in the day. Thankfully I also finally caught it re-run on one of the movie channels a couple of years ago agin. It was a bit better than I remembered-quite original I thought and well done, though I would have liked more answers as to what was going on with his powers.
But i'm unsure about buying the DVD. Are there any eztras, outtakes, extra scenes or anything or is this a bare-bones disc?? Thanks!!!!