Rithy Panh usually tweets at night, when he cannot sleep—which is most of the time, most nights. He seems to find it most comforting around midnight, 1 a.m., 2 a.m., the hours when most denizens of Phnom Penh are either in bed or far gone in some bar or beer stall, lingering over his iPad with a Dominican cigar and sending out streams of images into the darkness, to anyone who might be awake and watching.
He does it fast and in quick succession, image after image: a photograph, a doodle, a film still. Mr. Panh does not know who might see his posts, and he does not necessarily care. His first imperative is simply to tweet.