Snickering is one of the key steps to improved climbing outlined in the book.
First, he coaches you toward being judgmental of others, examining their technique for weaknesses where you might be better. Sometimes it's as small as being better color-coordinated than some hard puller, but you have to remember that the source of greatness hides in these small, incremental ego boosts.
Next, procede to quiet snickering among friends. By huddling together and mocking people who climb harder than you, you can diminish their acheivements- if only perceptually.
Ultimately, you become a spray-lord, fully emboldened to chestbeat about nothing in particular, and to loudly deride anyone, anywhere, for nothing at all.
Its like nirvana, but with an audience. Enlightenment doesn't count unless you let everyone know.