Ok, eviscerate this theory if you will, we have no other proof of him being in a fight apart from the orbital injury, and his statement about lost money and a phone (1 of 2) iirc?
Could the orbital injury have been caused if he got himself blackout drunk. or even just overbalanced, fell over and hit something hard on the way down, before trying to create a cartoon like hole in the ground with his body weight?
Could he have simply fallen over? Looking at the evidence, we have: no apparent defensive injuries, his statement only as to what happened, no media reports, and no police reports.
I have no doubt that the murse was taken, but that could easily be minor predators aiding the fallen gunt.
I have seen some odd injuries over the years, including one where a chap fell against a stairway and needed plastic surgery. The surgeon was rather amazed at the cause of injury, as normally it was caused by assault to the skull.
Do we have any credible evidence that there was actually a fight, and it wasn't just a simple alcohol aided fall.
I don't think we can trust his word on the mechanism of injury.