A hiss cut through the air with increasing frequency as the object approached, due to the Doppler-Fizeau effect.
Perhaps the hit man named Manuel came to perceive it when it was already upon him and that is why he momentarily released the pressure on the trigger. He never knew what was happening and when the deadly Ninja star named Shuriken cut his jugular from the left side, he exhaled and dropped his rifle over the edge of the cliff behind which he was hidden.
The weapon fell on the path by which the walkers led by Bertran came, who upon hearing the noise barely managed to take refuge among the foliage from which they were about to emerge when alarmed by the unexpected event.