How does Sylder end up killing the man?

The jack slams into Sylder's shoulder and he falls against the car and slides to the ground. The man swings again, but misses and instead opens a hole in the car's body. Sylder grabs the other end of the jack and manages to stand up. The two wind up wrestling one another on the dirt road. Sylder finally gets the advantage. The man begs for mercy--he asks to just be let go--but Sylder refuses. He grabs his windpipe and crushes it, killing the man.