Will Smith's new movie "Concussion" terrifies the NFL. Here's the trailer.

http://goo.gl/U1XN5S

The NFL's concussion crisis is about to hit the big screen. Today, the football site MMQB debuted the trailer for a film titled simply Concussion, due out Christmas Day.

It stars Will Smith as Bennet Omalu, the real Pittsburgh forensic pathologist who first discovered a neurodegenerative disease called chronic traumatic encephalopathy (CTE) in the brains of football players. CTE is the result of repeated brain trauma over time and causes depression, dementia, and other behavioral changes.