There's a big difference between high-risk sports like skydiving and bull running. The difference is that a skydiver spends many hours learning about and training for his chosen activity so as to minimize the risk. There's no training or education that goes along with bull running. It's basically just a bunch of drunks doing something none of them really know how to do well. I wouldn't compare it with skydiving at all. I'd compare it with Russian Roulette.