Legendary Pictures has started releasing a series of script-to-screen videos, breaking down important scenes from popular movies along with the actual script. They previously did the cafe scene from Inception with Leonardo DiCaprio and Ellen Page, and now they are doing the Penthouse Party scene from the Dark Knight where Heath Ledger's Joker crashes the party and has an extremely intense scene with Maggie Gyllenhaal. The intensity is ramped up by the story he's telling and the unsettling background music from Hans Zimmer.
This is an amazing example of an actor taking what is on the page and making it their own. Ledger's pauses and ad libs are just as important to the scene as the actual dialogue.
I'm not sure if Legendary is only doing these with Christopher Nolan films, but these are the first two entries I've come across.