Knife-Wielding Brawl at Northridge Wendy's Caught on Camera

• A violent altercation involving a man with a knife at a Wendy's in Northridge was caught on camera.
• The knife-wielding man claimed to be a hero during the incident.
• The incident led to a physical confrontation with another individual at the restaurant.
• The man involved in the altercation claimed to have acted in self-defense.
• Authorities are investigating the incident and have not yet made any arrests.