I think you'll find you friend is either playing a joke on you, or she is just extremely dim. Or she herd it from someone else who is wrong. You are right about the sheering of the coat, but they do not, I repeat do not, kill the sheet to get there coats.

Never ever keep things bottled up, no matter what that thing is, it will rip your insides out if you keep it in to long (it won't really rip your insides out, the just a sayingish thing)

In the movie, it's whats called motion picture, and in the book, well thats just writing. But also in the movie they will have had to leave different parts from the book out, because the movie would take all day if they didn't.