Mine is all of them!
However, if you watch this video featuring 75 years of Manic Pixie Dream girls, I will say that there is a scene where Charlize Theron looks absolutely, legitimately, insane. It’s when she’s rolling around with the dogs laughing uncontrollably. If there was different music then Though I think perhaps it’s Jennifer Aniston wielding the knife who comes off as absolutely the most terrifying. For the record: no one will think it’s charming if you come at them in their bedroom with a butcher knife. Just never try that. Never try that, ever.
For that matter, try not to be a manic pixie dream girl unless you can travel absolutely everyplace with your own sound system. For reference on why that’s a bad idea, you might enjoy reading this.