The wife and I watched Limitless last night. One word to describe it:
Basically (without giving much away), a man (Eddie) down on his luck (writer's block author) meets someone from his past who gives him a "miracle drug" sample that focuses his mind so that he can do anything. Needless to say, Eddie gets "hooked" and starts using this drug.
Obviously, things start happening, his "dealer" is murdered, people come after him, he has side effects, etc. I'll stop there before I give too much away....
The story line is good, the action is almost non-stop, and the ending was unexpected and very awesome!
This is a very good movie, and I'd highly recommend it to anyone.