This is the prototype for Predator. They found it was to top heavy and the actor could barely move without falling forward. A version of this was later in Predators as the River Ghost and was laying on the ground, it was a frustrating quick shot for fans!
COMIC-CON 2013: Predator 3D Figurine Features Your Decapitated Head -- The 1987 sci-fi action classic will be available to pre-order at the convention, and includes a customized toy. -- http://wtch.it/ynyz2