From RT.

It's actually really amazing footage - he totally headbutts the drone and he survives..! He walks away very normally and goes to hide in some trees.

This makes some sense - a high quality helmet can stop a direct .776 bullet to the head one time.

None of the shrapnel in one of these drones likely has that kind of force.

I imagine that he has big wounds from shrapnel on his shoulders, but I really don't know. Who knows, really... It depends on so much and there's just no information.

Truly, amazing footage.

I hope we can get the full story someday.