Albert Brooks SPOILERS
..one of the great portrayals of a "real" gangster.
Brooks had played a dangerous gangster type in "Out of Sight" some years ago, but it really didn't prepare us for THIS.
There is general interest and amusement in seeing Brooks play a businessman-type tough talking LA gangster for much of the film until we reach "that part":
Where with his building rage at the guy who screwed up the heist(in his mind), and in front of another "uglier" supposedly meaner Jewish gangster(Ron Perlman)...
...Brooks grabs a fork from its bin and sticks it in the screw-up's eye so as to immobilize(and brutalize) him, and then grabs a knife from ITS bin to finish the job with a knife to the throat.
Thus does Brooks let us in on a key aspect of a true gangster: "businesslike and quiet" on the surface, a psychopath capable of committing a murder that few people would have the stomach to execute(even Perlman's mean gangster has to look away.)
And then Brooks to Perlman: "There...this time you have to clean up after MY mess."
With Brooks now revealed as ultra-dangerous, the plot moves on until he has his little chat with Bryan Cranston(such a beloved character guy now, even when breaking bad). Brooks extends his hand for a handshake with Cranston, Cranston takes Brooks' hand, and that's all Brooks needs to bring out a straight razor, slash Cranston's wrist(in just the right place to cause maximum fast bleed-out) and speak reassuringly to Cranston:
Brooks: That's it. That's all. The worst part is over. It will be painless.
In his own way, Brooks the Knifeman has executed Cranston with a touch of kindness.
Then we get a brief bit with Brooks home alone and putting the straight razor back into a glass case with knives. We get the point(literally): Brooks is that most savage of killers, skilled with blades (I'm reminded of Solozzo the Turk in The Godfather, of whom Hagen says "Said to be skilled with a knife, but only for business.".) And he collects the blades. And "babies" them. He's a psycho.
Thus the tension is building when Brooks has lunch with our hero, The Driver and says "We'll put this to bed, shake hands on it , and go our separate ways."
In the final confrontation, Brooks indeed plays his usual game of playing the quiet businessman before pulling a blade to ram into The Driver -- but the Driver has a blade, too(likely he brought it with him given what happened to Cranston, whom he discovered dead.) It was "arty" to play out the final killing of Brooks by The Driver entirely in shadow, but I'm kind of sorry we didn't get to see Brooks know he was losing, dying.
And as for the Driver? Well, its left open.
In the meantime, Albert Brooks has gone down in film history as playing one of the most sickening and psychopathic gangsters ever -- a reminder that the "top dogs" in the business are mad dogs.