The goal of this paper is to clarify the interaction of subjects and parasitic gaps—a multifaceted topic that has mostly been discussed in scattered fashion in previous literature. Here I integrate a variety of facts about parasitic gaps in English, which I argue present a coherent picture: that subjects and parasitic gaps interact productively and straightforwardly, except when independent factors intervene. Specifically, I argue that the correct predictions about the interaction of subjects and parasitic gaps emerge from the hypothesis that movements which are in some sense too short fail (anti-locality). I extend this account to facts about parasitic gaps in PPs.