(Commentary by Katherine Churchill, Ph.D. student in English) When David Lowery and A24’s “The Green Knight” hit theaters July 31, I, a medievalist scholar, was giddy with delight. The film is absolutely stunning, and it’s based on one of my favorite books: the 14th-century English poem “Sir Gawain and the Green Knight.” The plot of both the poem and the film begins when a mysterious figure, the Green Knight, bursts into King Arthur’s hall and demands that someone strike him with an axe. What can I say: medieval literature is weird.