GRANTED!!!! You grow one millimetre taller. all is good!
Huh? Oh wrong potion, this only let's you be taller for a second, than it shrinks you to around 30cm
I wish that cm can grant a wish. (In the last one, I wished for that wish to be not corrupted. You said u granted it, but u corrupted it a second later!)
If you don't know it's impossible it's easier to do. And because nobody's done it before, they haven't made up rules to stop anyone doing that again, yet. — Neil Gaiman