Pre-frontal cortex & athletes

In class yesterday, I was compelled by the idea that Olympic athletes potentially mess up their "routine" because of what's going on in their pre-frontal cortex. From what I understood, the athlete's performance is skewed because of the sudden pressure and anxiety they feel from their new environment, thus squelching the possibility of imagining a successful outcome. Like many other spectators, I was particulary interested in what Lindsay Jacobellis was thinking when she "hot-dogged" it (David's term) at the end of her run. Lindsay was a student at Stratton Mountain School when I was a teacher there so I knew her personally and this final move (to show off?) did not seem like "her". It struck me that this is also what Phineas Gage's friends said about him when he suffered his pre-frontal cortex damage! So did Lindsay suffer damage during those final seconds of her run when she decided to jump up and grab her board right before the finish? Or were her neurons releasing so many endorphins that this caused her judgement to be impaired? Either way, when Lindsay walked away with the silver medal, I wondered if maybe she knew something that we didn't. A silver medal recipient tends to be honored and forgotten and maybe this is exactly what her pre-frontal cortex had planned.