Hakka Chinese "Pestle Tea"

Anybody ever heard of, or better yet, tried this?
http://drinks.seriouseats.com/2013/01/drink-this-now-pestle-tea-hakka-chinese-fang-gourmet-flushing-queens.html

Be sure to check out the slideshow too! There’s also a great article & slideshow on “Taiwanese style” oolong tastings at Fang Gourmet Tea in Flushing, Queens.
http://drinks.seriouseats.com/2012/03/fang-gourmet-tea-ceremony-taiwanese-chinese-flushing-queens-where-to-buy-tea.html?ref=obinsite
I SO want to go there next time I’m in NYC!