Yeah, that's his whole game -- inexplicably get the drop on someone who should've seen it coming (especailly since, you know, they can, well, SEE). 

But I mean these are constraints of the budget. I get that. It's pretty incredible considering what it is. It's not even the worst Marvel movie around, and they did it on a budget. Impressive shit. Helps that it's fucking [b]brutal[/b]. Stabbing people through the eyeball seems to be a recurring theme.