Ok, it’s definitely fake. Check this out.
Freeze at 0:11 of this clip of the grenade launcher fail…..
The guy is firing off to the left. notice the berm Geraldo is lying on. A large chuck of concrete just behind him.
Now skip to 6:26 of this clip…..
same berm, same chuck of concrete behind Geraldo but the guy is firing at enemy forces who are now on the right.