Check out my rumination on roller derby The Quit and the Damned.
Excerpt:New jammers, on the other hand, are all enthusiasm, all top speed and full steam ahead. In their minds, they are already in a power jam scoring countless points as the other jammer sits helplessly in the penalty box. The reality, of course, is much more sobering. First they find fear—a sudden unreasonable desire to pass the starred panty (which marks them as it did Cain though their invulnerability is a dare not a warning) to anyone nearby even as they slip it on over their glassy phallic helmets.