We discuss the dissociation of the OH radical in the title molecular collisions when both species are vibrationally excited. An analysis of the O-2 dissociation is also reported. All calculations employed the quasiclassical trajectory method and a realistic double many-body expansion (DMBE) potential energy surface for groundstate HO3. The results are compared with those referring to formation of HO2 and O-3 under similar conditions. Possible implications on atmospheric models for ozone production are tentatively assessed.