Improv Nonsense is a tumblr written by Will Hines, the Associate Academic Supervisor for UCB's New York theaters. It is one of the most popular improvisational theory blogs in existence, and arguably the most-read. Hines' posts often pertain to theory, but can cover a wide variety of topics.
Hines explains the blog as follows: "This blog contains memories, thoughts, opinions about long form improv. It will be unapologetically insidery, shamelessly indulgent and on many occasions completely wrong."