I'd like this a whole lot better if he were holding his grenade launcher. I feel like he should have some bullet wounds if he is holding this gun. I love his "pissed off" face, however, I think there should be some more detail in it. There is no lines and no shading right now, I know it is hard to do with water colors, but it would make this so much better if there were some more detail.
I like how it shades from dark at the bottom to light on top, however, I feel like the bottom is a bit too dark. It looks like he has nothing below the knees and he is simply floating around in a dark room. If Tony could float I am quite certain he would have lived.
You chose a great scene to draw from, this scene went down in history and almost every person knows about it, even if they have never seen the movie. This is one of my favorite movies and scenes, Tony took out a lot of people all by himself and I'm sure they were both pissed and surprised that so many people died to just one coked up man.
"I take your bullet! Hah! I take your fuckin bullet!"