Excellent
Looks pretty good to me. Good choice of music, good choice of clips. It shows your artistic and technological accomplishments thus far, and you have the words popping up to string the whole thing together. I like.
Of course, I say this assuming that you're aiming this at an entertainment sort of audience, or at least one that can appreciate the artistic merit of this, rather than folks who just say, "Eww, blood. He's scary." Cuz if I made a demo reel like this for _my_ bosses, I'd be stuck in the mailroom for life.
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MJ