When you do the Ali-G handflick in the general direction of someone you dont like and all your bling flies off your hand and hits the person for whom the gesture was intended.
Retrieval of the projectile is not essential as it only cost 50p
Some Idiot, "Hey, Ali-G, your an idiot"
Ali-G, "Boyakasha", and his knuckle duster flies off his hand and smacks the idiot in the head from a range of 16 meters.
Ali-G's mate, "Nice Blingshot"