In Derek Presley’s latest film, Tonic, we follow the ups and downs of a barfly jazz pianist. In this down home story – told over one exhaustive night – Sebastian Poe (played by Billy Blair) is a man out of options who constantly weighs his pressured offer to commit murder in exchange for his drug debt to a crooked cop. A no-win “what would you do?” scenario if ever there was one. But let’s clear some things right up front. There is no Liam Neeson, no flashy cuts and edits, or heroic music. In fact, there is no music at all (save for needle drops and source music which was done live) just the…