Continuity mistake: The doctor starts out carrying a Holland and Holland "Royal" Double Rifle; but when he and Tarzan pursue the train, the doctor loses his H&H rifle in the leap from a cliff. Lo and behold, after they commandeer the train and disembark, the doctor is inexplicably carrying his H&H Double Rifle again. The H&H is not a common rifle, even today, and his chances of just discovering an exact replacement aboard the train is beyond coincidental.
Add timeCharles Miller
Factual error: Virtually all of the CGI animals in this film are rendered at about 150% of their natural size. Additionally, even a small gorilla could tear the strongest human limb-from-limb, so Tarzan wouldn't have lasted two seconds in a hand-to-hand combat with an alpha male gorilla.
Add timeCharles Austin Miller