CineFix sums up Keanu Reeves in The Matrix hilariously: he gets his arse kicked, learns to kick arse and then promptly kicks everyone's arse. The problem that you maybe didn't know? Keanu actually couldn't kick in the movie's epic fight scenes.
He had spinal surgery before filming which prevented him from kicking, so fight scenes had to be re-choreographed to downplay Neo's kicking. Other factoids include S&M night clubs, twins, real stunts and saving money.