Well, Kai is nervous watching him, even knowing that the thing has no ammunition.

"A very powerful one." He reaches out and shifts the gun in Paris' hand to point at the ground, adjusting his finger closer to the trigger.

"Lesson one, this is the muzzle. The bullet comes from the chamber out this end, and it's moving very quickly. Which leads to rule one, never point the gun at anything you don't want to shoot."