After the performing musicians, the next most important person in a performance is...the pianist's page turner!  Who knew?!  Do you even notice the page turner at a concert?  (You shouldn't notice the good ones.)  Yet, the page turner is critical to a successful performance.  Practically every musician has page turner stories.  It most definitely takes a certain personality...see Tuesday's Wall Street Journal piece:  http://online.wsj.com/article/SB123905872759294777.html
 
For a different kind of page-turner drama, check out "La Tourneuse de Pages," http://movies.nytimes.com/movie/350358/The-Page-Turner/overview, which shows what a killer of a job page turning can be.