You're proving my point, really. The pictures from the actual film don't resemble the Sideshow piece at all. In the film, he does tend to slump over a lot of the time, but it's nowhere near to the extent that the Sideshow statue is showing. It's such an awkward pose, with his right hand pulled back and up so high and his left shoulder slumping down so hard. It looks like his shoulder was dislocated. This isn't even bringing up the "on the toes" half squat position his legs are in. It's just so awkward.
The poses below would have been much more preferable and made more a better statue.