What do you see in this picture: Wolverine or two Batmen?

Apparently this take on the Rubin's vase illusion has been bouncing around for awhile, but it's a fun visual trick. And, as a commenter on CBR noted, "Wolverine or two Batmen" is plotline of The Prestige.

What do you see in this picture: Wolverine or two Batmen?

This illusion comes from the always marvelous Olly Moss, who says he actually came with the idea on the way to meet with some folks at Marvel, but opted not to share it with them. Probably too much Batman.

[Olly Moss via Geeks Are Sexy]