Hmm..I wouldn't personally know, but I definitely don't recall ever seeing someone say they hurt. I've heard complaints of being too heavy, too big, too shiny, not realistic, the glue not being strong enough, but no pain. So far, the best bet to me (as far as realism and glue go) seems to be the one from the FX reelmagic store. I just wish they had a smaller one. But hey, by the time I get the money, they probably will 😀 I mean, 6" (their smallest) isn't bad for play, but for packing? Too big.