My buddy Derek showed me one time that you could actually get the Bull Alien to balance on his back legs. The articulation point in the Bull's neck allows him to look forward while standing. It's kind of a cool display option
The Bull Alien has four hip joints, a joint at the end of his tail, and a pivot at his neck. As mentioned before his neck can extend out from his body to make his neck longer or "ram" a Marine. The Bull Aline also came with a face hugger accessory to use one the human figures from the line.