Yes, I oppose it - b/c test have been done where the head can respond up to 15 seconds after - but not becuase it looks greusome.
Let's see how that compares to other methods of execution (here are some of the worst examples - full list here:
http://www.deathpenaltyinfo.org/article.php?scid=8&did=478:
Admittely I used some extreme examples; but they all sound like Cruel and unusual punishment to me. Let's face it, the Death Penalty is entirely a knee-jerk reaction of crusty reactionaries who spout a very unusual and undemocratic form of justice. One which seems more focused on being punitive than either being humane or even finding out the guilt or innocence of the accused (Of course as this is America I should also add that there is a racial aspect to all this...) and is totally against the idea of civilisation (which I suppose is about making the so-called savages into whatever we consider normal..)