For some reason, reading this, I was seeing it cinema-style in my head -- no music, just the juxtaposition of the laughing and joking Cardassians trying to reach out a bit with the kid and his heavy breathing and his heartbeat pounding as he raises the gun ... making everything seem super-ominous.
Agreed. I could see the scene as if in a film and I could hear
the silence, if that makes sense? The filter, the muted, surreal nature of it all then broken suddenly and powerfully by the shot, and it all becomes far too real and shoots into focus for us- and the characters (the human boy especially).