What's with the little numbers? I have a few climbing friends (I include you, duh!) and they go off on these awesome-sounding trips and come back with reports like "Monday we did Kerfuffle (4.3) and then Tuesday we went out to the north face of Foofaraw (7.293) and then Wednesday we hung out and drank some beer because it rained, and then Thursday we climbed Ol' Jinglyschmerz (π^2) in the morning and headed home and boy am I sore". And, like, I can guess that it's all about grading how hard particular climbs are, and I assume that bigger numbers are more badass, but is that an average badassitude number? Or the maximum badass at a specific point on the climb? Or what?