“Halloween may not be a great night to open a movie,” says documentarian Marshall Curry, “but the Hollywood Reporter did call it a ‘nonfiction thriller’ so I’ve been telling people it’s appropriate.” The appropriate movie is “Point and Shoot,” Curry’s multi-layered Mideast adventure-cum-cultural-critique on which he served as a kind of ghost writer with attitude: It was Matt VanDyke -- American adventurer, soldier-of-fortune, partisan in the Libyan War, POW -- who brought back the footage that makes up “Point and Shoot,” and who turned a fascination with Arabia into a motorcycle trip from Europe to Africa; sojourns in various hotspots; a term as a freelance war correspondent embedded with U.S.