After the running of the bulls, the bulls and runners end up in a bull ring. Two bulls are let loose for the runners to tease. Sometimes the bulls gets even and take down a runner. Judging from the crowd reaction, I think that's what they really came to see.
This is a video of some of the chaos in a bull ring. It's a short clip and not very steady because I was running for my life!
Taken on July 8, 2006.