Answer
The trick lies in the fact that the body rests on large number of nails so when a person hits the anvil with a sledgehammer, the force gets distributed on the tip of large number of nails thus the pressure generated (force/area) is small and the nails do not pierce the woman's skin.
Work Step by Step
The trick lies in the fact that the body rests on large number of nails so when a person hits the anvil with a sledgehammer, the force gets distributed on the tip of large number of nails thus the pressure generated (force/area) is small and the nails do not pierce the woman's skin.
