"The venom of a black mamba can kill a human in four hours, if, say, bitten on the ankle or the thumb. However, a bite to the face or torso can bring death from paralysis within 20 minutes. Now, you should listen to this, 'cause this concerns you. The amount of venom that can be delivered from a single bite can be gargantuan. You know, I've always liked that word... "gargantuan"... I so rarely have an opportunity to use it in a sentence. If not treated quickly with antivenom, 10 to 15 milligrams can be fatal to human beings. However, the black mamba can deliver as much as 100 to 400 milligrams of venom from a single bite."