I really like this. The dynamics are incredible! I like the patterns on his scales, too. The dust flying is pretty awesome too. Gives a great sense of motion. The tongue hanging out makes him look kinda goofy, almost like he has a hidden playful side.
Wow, this is amazing! The portrayal of movement is very well done, as well as the realistic lighting. He looks real enough that I feel like I should run away in case he jumps off the page! I would love to see more like this in the future!