In Miami, MMA fighter Javier Baez had to fight for his life after a knife-wielding maniac started attacking him in the parking lot of his apartment complex…

A former MMA fighter used his combat skills to open a can of whoop-ass on a knife-wielding assailant in self-defense… and the dramatic scene was caught on video.

Javier Baez drove back to his Miami apartment complex after a night out on Halloween … and spotted Omar Marrero screaming and brandishing a knife in the parking lot, according to WPLG News.

After Baez parked his car, Marrero reportedly walked over and started hitting his window with the knife.