The ONLY person I've ever seen come up with a picture of that "supposed" variation is Aaron, over at POTF2.com.
But I still say it's some type of production error, or funny angle of the hand in the bubble, or something like that, 'cause I've NEVER heard of (or seen) anyone
else actually owning this figure.
It's a pretty convincing shot that Aaron has, but even though I chase most variants, this isn't one that I'm going after since I'm not entirely convinced that it was an actual running production change. The only difference is that the fingers are slightly (but noticeably) more curled/clinched.
Not that I wouldn't mind owning one, however...