hmm. prolly because it isnt plausible. theres a scientific term for this, but i cant remember what its called. something like...surface...something or other. a tiny little person cant move a planet. not because they arnt strong enough, but because the huge amount of force on a tiny little area would cause it to crush instantly. yet again, the laws of physics are different between the two shows, and each of them can do something the other one cant. not because they arnt good enough, but because its not plausible