Crick! Crick!
The wheels of the mini-train made soft rhythmic noises as it slowly moved through the underground rail, apart from this sound no sound could be detected on the rail and not from the soldiers too.
Clark had a poker look on his face as due to boredom started simulating different results of this assassination attempt in his head. Despite the numbing silence, he did not try to break it.
Only the sound of their breaths could be detected, following the up and downward movement of their hearts in a rhythmic manner.
From the reaction of the few assassins, Clark easily deduced that they received special training to curb the effects of such silence. And though Albert was affected, he could still control himself to keep quiet also.
Clark didn’t know for how many minutes they’ve been moving, but from the mini-train’s speed, he knew that they’ve crossed dozens of kilometers.
Clack! Clack!