http://blog.saeculumresearch.com/2012/11/millennials-and-xers-taking-the-tough-mudder-pledge/
Millennials (and Xers) Taking the Tough Mudder Pledge | Saeculum Research Blog
Half a million (mostly) young people, from a single generation gathered in a field, covered in mud. Woodstock? The parallels are amazing. Except instead of self-expression and spiritualism, my generation values teamwork and physical prowess.