I still have no effing clue what the Joaquin Phoenix documentary, “I’m Still Here,” (directed by accused sexual harasser Casey Affleck) is about, but I can’t wait to see it and find out. If only so I can finally learn what his god-awful crazy homeless man makeover was all about. Will Joaquin show up to the premiere freshly shaved or “in character” (if indeed this was a character)? I’m confusing myself. Sorry.