The taekwondo was pretty amazing, with incredible flipping, dual board-breaking
Cirque du Soleil was fantastic too, and has been something I've watched on TV and always wanted to see in person, so this was really great! The story was of a young girl who is bored and ignored at home, and so who imagines a fantasy world composed of very talented gymnasts, jugglers, mimes, and other assorted circus folk. Some of the especially memorable acts included four little girls of about ten performing some crazy diabolo moves, and four men leaping onto and off of each other's shoulders... There were some great contortionists, too... They also did a little play with random members of the audience which was very funny and worked surprisingly well. All in all, some awesome stuff!
Here's a youtube video of the diabolo girls: