I liked this bicycling bear. Although, I'll admit, I did think of 'animal slavery' when I first saw this act. On the other hand, he did look like he was having a good time!
My other favorite was this man who ran on top of this wheel contraption thing. It was so nerve wracking to watch! But yeah, it was a good time, besides all the noisy children everywhere (what were they doing at the circus??) we had a great time :)