Unreleased WWF Hasbro "Chest Growing" Hulk Hogan

According to WrestlingFigures.com member rvd3434: "Looking into the mechanics of my unreleased WWF Hasbro growing chest Hulk Hogan prototype. It appears if you move his arms upwards — twisting the metal pins on his shoulders, the part on his chest will come out (hence the look of ‘Hulking Up’ or the effect of the growing chest)...not sure how the mechanic looks with the rubber torso in place but this is pretty sweet!"