Put it just after the boast about the weapon, then follow with the reload gun sound to underline the correction, and finish with a fail sting when the joke collapses. For a slower build, open with the moment he knew before the rebuke lands.
Über diesen Sound
This three-second clip catches Sergeant Hartman barking a sharp Italian warning that the shotgun in front of him is no grandfather's hunting piece, his voice clipped, loud and dripping with drill-sergeant contempt. It feels confrontational and darkly funny, the kind of dressing-down that makes a room go quiet. The line comes from Full Metal Jacket, spoken in its Italian dub.