Use a little showmanship to shift the balance favorably.

This belt buckle has a small keyhole labeled with two positions, safe/launch. Insert the key and turn to launch, and a small red led comes on inside a big red button protected by a clear plastic cover.

Simply flip up the cover, press the button, and a spring flings the two halves of the belt buckle dramatically apart while pressurized air generates a sharp hiss and a quick puff of fog.

You will have to come up with your own patter about national security, or mega-lady-deaths. As a word of advice, if you are worried about size, "fallout" might not be the best direction to go in.