I tried once but the damn thing just came back to normal after a minute or so. I will try to throw one in distilled water one day to see if it explodes or something.
Besides, I don't get all the sudden love for slugs and the talk "oh, don't do that, it deserves to live as much as you". A slug hardly have a nervous system, and even if it did, who's to say it is conscious or anything?
I'm just trying to make sure you guys aren't hypocrites or anything. If you want to respect life, then don't just respect animals... killing a weed and small patch of grass is just as bad as killing a slug or a dog or whathefuckever.