O fer... Journey 2: The Mysterious Island just lost it. It has a 120-year cycle, spending "half that time above the sea"? Okay, no big deal ... except that they're trying to convince us that 60 years is enough time for "island evolution" to make elephants the size of fox terriers.
You know? I don't think so.
I mean, sure, they have the giant insects that are such a staple of bad s-f films, plus the "falling a tremendous height but being caught just above the ground so you're okay" thing - but ignoring the inverse-square law is one thing. Pretending that regular-sized elephants will arrive on the island and evolve that quickly? Just nonsense. Don't even pretend to explain things if you're going to be that stupid.