AAAAAAAAAAAAAAAHHHHHHHHHHH!!!!!!!! . . .
The ability to link robotic limbs to the brain so people who have lost an arm / leg can have that function back. or for people who have lost their eye sight can have a robotic eye instead.
also its not crule at all. if it can give something back to poeple who have lost something or born with out. then its worth it.
and dont say " how about we do these tests on you!" bollocks. the whole point of doing it on animals / insects is so that it doesnt have to be done on humans