Film Aims to Show Football's Culture of Playing Despite Concussions

The documentary's title alone is telling. To ring someone's bell in football is to hit them hard -- really hard -- usually in the skull. Levens believes that by speaking to fellow players in their own dialect, "locker-room language," he can persuade them to be frank about their injuries and conditions, especially concussions.

It's a topic that generally makes players reticent around reporters, doctors and NFL officials...More?

source: cnn.com