All major sporting events have streakers. The stadium people higher more security gaurds just for that reason. It's not a major sporting event without a streaker, to most people anyway.
And it was not an accident, with the nipple ring being there (no one would wear one that fancy if it was not to be seen), and with the great timing with the lyrics and all. And everyone here is thinking like a teenager (exactly like I think)..."big deal, every one there has seen one and little kids know what they are." But if you were a parent, would you want your 6 year old son looking at that? I sure hope not. Sure it is a perfectly natural thing. But still, little kids should be exposed to that kind of thing at a family event.