Heath Ledger’s A Creep
Understandably, Heath Ledger went a little loopy, considering he spent a month alone in a hotel room to prepare for his role as The Joker. He had to immerse himself in the mind of a book villain, and it sounds like he carried that mindset throughout the entire production set. This poor Reddit user had to share the elevator with him, and instead of simply standing next to her, he acted like a total creep and stayed in his character. He was trying to keep his mindset but at the cost of the mental state of the employees. At least this woman has a good story out of the experience (via World Travelling).