I think a lot of people will say that this was Cooper's first serious break. I believe that it was Barker's Midnight Meat Train, but it was because of that film that I knew he had a "Limitless" in him. Not a very recognizable look but intriguing and unique. Great story, great cast, great writing, and then De Niro shows up. I think it's wonderful to see someone with a "good old boy" academy stature like De Niro give his blessing to a movie like this by playing a background role the way he did. Would the movie be good without him? Sure. Did he take Limitless to the next level? Definitely. This flick was just a touch off being perfect and isn't just a must see but a must own. Everyone loves the "lottery" type movies that beg the questions, "Could you imagine?" or "What would you do?". Interesting twist at the end as well. A great example of how to walk away with your hands raised in the air.