Another design that Lego should issue as a set. I love the repeated black parts down its spine and the segments of the tail. The face is brilliant with its menacing yellow eyes and viscious teeth. The photo with the cowboy works very well, though in my opinion mini-figs should smile through everything :)
There is a lot to like here. The startled look of the cowboy and his horse set the scene perfectly, and the MechaDINOS rules. That bottom jaw makes the dino look so tough, and the tail, the eyes and eyelids it's all fantastic.