Plane crashes and tundra crossings have made for some pretty solid survival tales in the past ("The Edge," "Alive"), but when you add Liam Neeson and a superpack of bloodthirsty, overprotective wolves to the mix, you've got a whole new type of genre: part horror film, part thriller, part survival tale, and part existential drama. That's what you can expect from " The Grey ," which hits theaters this weekend. But there's also lots of interesting stuff you wouldn't expect, so here are five fun film facts for you to howl about.