This is a hint of what's to come, although Mike isn't aware of it.
Legend has it that one of the only ways to kill a vampire is to stab it through the heart with a wooden stake. The preferred wood was ash, hawthorne or oak. However this method would not work on Stephenie Meyer's Vampires:
Q&A with Stephenie Meyer (from the twilight lexicon)
Q: How about stakes through the heart? Reflections? Photographs? Holy water? Garlic? All that traditional vampire lore.
Stephenie Meyer: Bunch of garbage. I think all of them get addressed in New Moon except garlic and stakes. But you try shoving wood through granite.