Prominence Dynamics Holly Gilbert1, Terry Kucera1, Rei Kawashima2, C. DeVore3, Judy Karpen1, Spiro Antiochos1 1NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA 2 University of Tokyo, Tokyo, Japan 3 NRL, Washington, DC, USA Fine structure prominence dynamics are visible in the majority of high-spatial resolution data from SDO and Hinode SOT. We present the results of a study investigating the nature of these horizontal and vertical flows and discuss them in the context of ion-neutral coupling in a partially ionized prominence plasma. We also discuss how models can help in the interpretation of these observations.