With zero training it kinda makes sense: You hold the stock of your gun to your shoulder for support. So the soldier might have thought it's the same for RPGs..
Is there a higher res version of this somewhere? It's hard to make out, but the guy holding the rocket launcher has muscle-tone visible visible on that right arm... which means his camo is sleeveless? .....which means that white shit flapping around is skin?
I've seen vids of people skinning deer with a air compressor - this motherfucker might have just done the rocket powered version of that to himself.
Kinda takes 'shooting yourself in the foot' to a whole new level. Which is appropriate, considering where he is and what he's doing there.