Plot hole: Christopher Columbus speaks Italian while the Huns supposedly speak their native language. Shouldn't Octavius and his Romans speak Latin? (00:34:50)
Plot hole: Why does Larry wait until the Mayans come alive to lock them up? I know he's allowed to be stupid but he had a lot of time to sit and do nothing and I can see no reason to wait.
Answer: Columbus is speaking Italian. The first night, when Larry asks him about the lions, he says "Go find the lion somewhere else" and then "tourist!" The second night, when they're chased by the animals, he says "Young man, do your job well, take care of the beasts" and when he sees that the window's open, "Kid, what do you say, shall we close the windows?" The last night, when Columbus is guiding the Neanderthals, he says "Fellow Neanderthals, with me!" and to the night guard "It's over!"