I can't see much use for this thing for anything other than a mentally disturbed individual who has barricaded himself. Flash Bangs work because they overwhelm multiple senses of the human nervous system, not just the eyes. The tremendous noise, flash and particularly the pressure wave of the NFDD can be effective, but even that is not a sure thing. I have never seen or heard of a suspect being released and charges dropped because of police use of NFDD.