Namely, this means inside the genjutsu, the physical world's common sense is completely irrelevant and opposing the caster is impossible. Somebody caught into the Tsukuyomi find themselves into a strange world of infinity, their fate entirely lying inside the caster's hands. Some time, they will undergo the torments of Hell, and some other time, they will be repeatedly shown a horrendous, hellish picture of agony and mayhem with no idea of when either of those will end. As a result, the poor prisoner can only wait until the collapse of their psyches! Even a body made of steel that moves at the speed of light is powerless before this jutsu
, which is the reason why it is feared as the most powerful!