Sean Bean
Lots of these guys were tough before they were actors—but Sean Bean was tough long after becoming an actor. In 2012, Bean confronted a man who insulted his date at a restaurant. The man went after the actor with a shard of glass, but Bean blocked it with his forearm, leaving a deep gash.
The staff at the bar urged Bean to go to the hospital. He just asked for a first aid kit, wrapped his arm, and went back to have another drink.