I have a question that has perplexed me for years now. Maybe this has been discussed before or maybe not, but I need to have an answer. You see I have this really bad habit, gift, curse (call it what you may) of noticing very slight insignificant details. And it is because of this ability that I now write this blog.

Okay, we all know that Lightsabers cauterize a wound instantly. As we have all seen in almost every apendage hacking scene this hextology has shown us. And it even states this as a fact in one or more of the books in the Expanded Universe. There is no blood no gore nothing just a nice 'clean' wound. Luke's arm wasn't bleeding after Vader sliced it off?
Anakin didn't bleed when Dooku cut off his arm? Or for that matter, he didn't even bleed when Obi-Wan cut off everything else? Except in A New Hope. During the cantina scene we see Luke at the bar ordering a drink, when he is accosted by some guy (I use that term loosely) that is wanted on 12 systems. Then Obi-Wan steps in and tries to diffuse the situation. When this doesn't work, and the guy pulls out his blaster. Obi-Wan instinctively pulls out the lightsaber and with a couple of deft moves he slices off the arm of the guy that was trying to pick a fight with Luke. After which we see a BLOODY arm lying on the floor of the cantina.

So my question is why is this amputated arm bloody? How come no one else every drew back a bloody nub after and unfortunate hit with a lightsaber? Was it really blood, could it have been someone spilled a drink? Or just what?

I have just wondered about this for years, and I just put it in the back of my head and went on, but now my 7 year-old son has the same abilities that I have (great genes has he) and has noticed the same thing. And I don't have any answers for him . . .or myself.
So if anyone can please shed some light on this, please do.