Giant St. John's Wort

I yell at the TV when I see horror movies use flying fox bats instead of vampire bats. It ruins the film for me when they try to pass off a flying fox bat that only eats fruit as a blood-sucking vampire bat (actually it's more like a blood-licker but that's another story). I was recently watching a favorite movie of mine, Anaconda, and the TV station followed it up w/ the movie Bats. The premise of Bats is a government agency has taken flying fox bats (because they are a large sized bat) and modified them to become carnivores w/ a taste for human flesh. I was OK w/ that until they showed a close-up of the bats. Wouldn't you know it - the film did not use flying fox but vampires! More yelling.