The Prestige.
This is a fascinating story of two magicians caught in a game of one-upmanship. I can’t say more than that regarding the plot, without spoiling it.
The movie starts with a scene of just a few seconds, and the question “are you watching closely” is asked, and the scene is gone. Watch that scene closely. 
The plot is a bit hard to follow as it jumps all around in time, without much reference/context other than what you figure out… So this would definitely would be a good movie to watch a second time.
Quotes:
man’s reach exceeds his grasp
man’s grasp exceeds his nerve
society only tolerates one change at a time
obsession is a young man’s game
man’s reach exceeds his imagination
