As the saying goes "bad things happen in threes". The pause that one takes as one realizes that a bad lifestyle choice might ultimately result in death, addiction or health problems is emphasized by a sickening feeling of regret, slipping and falling into the darkness. This lifestyle could make one merely a ghost of one's previous self.
This is a composite of two images with differing, overlapping, planes of focus to depict the feeling of drug use and the mindset of an "addict". Does one fight the addiction or choose to carry on using drugs?