Oxygen jet might happen in the process of water gravitation. Photovapor is an analogy of Photoelectron. If incindence angle of photon on the surface of water is very oblique, photovapor of Dangling bond water molecules might have antiparallel spin normal to the incidence plane. The proton spin of hydrogens should be also antiparallel for Pair annihilation which might jet electrons. Further annihilation might happen for antiparallel spin oxygen necleus which might jet protons. It's hard to say, secondary gravitation of water vapor pair W2 might give O2.