This will take the fight out of ANY intoxicated combatant. Now most person's will say, it's because of the 1.3%, that's somewhat true
In today's world, who ever you encounter is willing to lie through their teeth - just to see your reputation destroyed.
Foam means - the person was definitely inside that 4-6 foot zone and were approaching or acting aggressive.
This stuff doesn't linger in the 'foam' state for long, is actually dissipates from that state the very moment is makes contact with any surface (skin, clothing, etc.)
I actually carry the Mark III behind my firearm (upwards or upside down), but recommend this if you only intend to carry 1.