Sergio Leone-style ending
The climax to Nighthawks slightly reminds me of those Sergio Leone westerns where you see a close-up of the antagonists' faces before one of them draws. That's what you get when Wulfgar and DeSilva face off, the only difference being that Wulfgar has a knife. First, you see a close-up of DeSilva's eyes which show how mean and composed he is, then the camera pans towards Wulfgar's eyes, showing how shocked and eager he is to kill DeSilva. You notice one of his eyes twitching before he tries to stab our hero.
It's actually a nice homage to spaghetti western endings, even though it is a thriller.