He was arguing both though if I recall correctly, he said that Russian grenades weren't able to kill, and were designed to maim, so that guy was alive and in terrible pain. When in reality he was probably only alive for a few seconds after the second one and was probably unconscious for it.
He was arguing that since Russian grenades were stun grenades, that the whole thing was super painful and he felt every minute of it. But the guy was trying to tell him that once he sustained that level of injury, the brain shuts off.
I guess I'd look back on exactly what he was saying if he didn't scrub his comments.