A bird's egg filled with itching and blinding powders, the blinding egg is thrown like a grenade (Short range) and bursts to fill a five meter diameter cloud. This has a base damage of 8, applied against Constitution; instead of inflicting damage, it causes a loss of one shot per two points of "damage".
If applied in melee it has a damage value of Strength +2. This is in addition to the area effect - consider the melee target to be the first target of the area effect, and apply the lower damage rating to secondary targets.
A proficient user is immune to his own boinding egg - someone who lacks the schtick but tries to use it can harm himself.