Left hook

Up to this point, Sam lacked extensive combat experience. 

In this instant, he felt a twinge of nervousness, but he quickly regained his composure. 

He had nothing to fear; the adversary's handgun was gone, leaving only a fruit knife in his possession. 

Sam's body had been augmented by the system, boosting his attributes far beyond those of an ordinary person. Even if he were to be stabbed, as long as it wasn't a critical area like the heart or neck, Sam would be fine, suffering at most a minor blood loss.

The man opposing him, looking both frantic and hysterical, cornered and desperate, what chances did he have against Sam's punch? 

This thought dispelled Sam's fear. Of course, if this had been during his initial days in this world, his instinct would have been to flee and immediately call the police. 

Recklessness has its limits; sometimes, bravery alone isn't enough.