What is the best in-theater movie you’ve seen after going in blind?

I saw 2 that rank at the very top of my all time list and knowing nothing ahead of time made them that much better.

1. Good Will Hunting. I went with a date, she picked the movie and I’d never even heard of it. 1st and only real date with the girl, but I fell in love with the movie.

2. No Country For Old Men. Went to see it in the theater with my now wife after I had proposed to her earlier in the day, which also made it memorable. Was also in a really cool historical theater in the city we were visiting.

What are yours?