The anomalous properties of water have attracted great attention from the scientific community for a long time and they are still a topic of intense research. These remarkable properties, most pronounced in the supercooled metastable state, can be ascribed to water unique structure, consisting of a random and fluctuating three-dimensional network of hydrogen bonds. Although it is clear that the hydrogen bond network, its fluctuations, rearrangements and dynamics determine the properties of water, these are far from being completely understood. These issues have received great interest in recent years thanks to possibilities opened by novel experimental techniques, detailed theoretical predictions, and computer simulation methods. In particular, Deep Inelasting Scattering (DINS) technique has been recently shown to be particularly suited to study the interactions between a single proton and its neighboring oxygens in terms of proton mean kinetic energy and momentum distribution. In this report we present a preliminary study, using DINS technique, of two samples: supercooled water under pressure, and heavy water in both stable and supercooled phase. Although those studies need further investigation, we can identify some important and still unclear aspects.