Hoist with his own petard, as they say. An *own goal.*
Sounds like an untrained user not real familiar with the effects of either end of an RPG-7. I'm reminded of the story of some North Koreans who captured a US M18 57mm recoilless rifle in the early days of that war, decided to try it [the weapon vents the fearsome blast of it's launch to the rear] and a bunch gathered around to see how it worked....
Figuring he had it turned backwards, the intrepid shooter turned it around for the next shot, and that was the end of that. A variation of the story was used for a scene in the 1985 Arnold Schwarzenegger film Commando. The moral of the story is to be careful about telling your best war stories to aspiring Hollyweood script writers.
-archy-/-
Stay Safe !