Heath Ledger turned up, did that, and now every comic book villain is just trying to keep up.
Fun fact: "Heath Ledger locked himself in a hotel room for six weeks to develop the Joker's voice and mannerisms."
Billion-dollar space station taken out by one bloke because nobody thought to cover a vent.
Fun fact: George Lucas traded his directing salary for merchandising rights, a deal now worth over $20 billion.