A few times in recent Hollywood history, we’ve seen nearly identical movies come down the pipe in the same year. And over Thanksgiving weekend, Noah and Chance doubled their duty and watched six movies, three pairs of action movie twins. There’s the gargantuan “Armageddon” and the trying-to-be-smarter “Deep Impact” that sent celestial killers toward earth in 1998. There’s the 1997 volcano flicks, “Volcano” and “Dante’s Peak” about civil servants fighting to save cities in denial from lava flows. And there’s “Flightplan” and “Red Eye,” which put unsuspecting women in danger during night-time plane rides in 2005. Welcome to the Megapod, folks.