It is the coming of age story of a young girl named Jane who learns to overcome her emotions and instead make choices based on morals.
It may be a Hyperbole or Satire. Since sawing someone's leg off is likely to be exaggerated, it may be a Hyperbole.
At the same time, depending on the context of this sentence, it may be said for the purpose of humour, so Satire.
Hyperbole seems more probable in my view. :)
Beecher Prep sounds like a great school and I believe it’s a private school so more opportunities to get into good colleges and universities.