You knew Burt Reynolds was a badass ... but did you know he once lit up Brian Bosworth for NOT hitting him hard enough?!?!
It's true ... Bill Romanowski tells TMZ Sports the late Burt once got so mad that The Boz wasn't going all out for a movie scene -- HE CHUCKED A FOOTBALL AT HIS HEAD!!
It all went down on the set of "The Longest Yard" (the 2005 one) ... where Romo tells us the then 69-year-old Reynolds had to beg one of the best linebackers in college football history to run him over for the movie's crucial scene.