Alright I know this has already been mentioned but it looks like I'm gonna have to point it out to everyone. the robot is not based on a dinosaur even less tyrranix from the previous pic, it's based on on gorghadra who's a space alien. I'm not trying to put anyone down here I'm just pointing this out. as for the picture itself, it's really good, very well detailed, I can see what you mean by3 days worth of work.
Everything at the water level - splashes, flames, smoke - is mindbendingly realistic. How in the hell did you learn to paint EVERYthing on earth so damn good? Seriously, that water and the splashes are just..... pfff, whoa