My costume was being the only one over 30! The Boston Common theatre had scheduled three 12:01 showings, but they ended up opening several more screens to accomodate all the last-minute folks. And they were all full.
No spoilers here, I know.
Just to say, Heath was mesmerizing. After a few moments, I stopped seeing Heath at all. It was pure Joker.
I'll post more on the spoilers thread, just in case.
I'm exhausted.