You gotta watch this video ...
Ex-NFL star Akbar Gbaja-Biamila -- the host of "American Ninja Warrior" -- describes exactly what happened when he decided to get in his car and chase after an SUV that hit an LAPD motorcycle cop.
Its an incredible story ... before AGB gave chase during the June '14 incident, he blocked traffic so other cars wouldn't hit the downed officer ... an incredibly smart decision.
Once he felt the cop was safe, Akbar got in his car and raced after the suspect -- in a story that sounds like it was written for a Hollywood action film.