So, I'm a big fan of Firefly and Serenity, and especially a fan of River Tam. (They're a great tv show/movie (respectively). I would reccommend them. They've got something for everyone - it's a sci-fi western (no, not like Cowboys and Aliens). It's got romance, action, zombies (sorta), and... well, it's good. And River is awesome.)
I love this line. It's one of her most famous, but it's still awesome.
Another of my favorite scenes. River makes me laugh (except for when she's beating everyone up -- that's just plain fun to watch).