When the Player uses a barrel on a rope to knock an enemy NPC out of a hole in a cliff face, the barrel plummets to the sea first and much faster than the enemy NPC. According to the laws of physics, both should fall at the same rate.
Given that the pirate entries are from the early 18th Century, the narrator should be speaking with an accent from Britain, and should also be pronouncing 'lieutenant' the British way.
Mr. Carnby, despite entering a dangerous situation, only brings his revolver and no spare ammunition other than the 6 rounds in the revolver.