I decide from different point of view answers this question. Problem advocate say to raise a hand to change at will in your word personally, we set out from here, button raises a hand to change at will personally this one, can discover a few problems.
Countryside show tree regards terrestrial system as existence at ordinary times, responsible Aoteman is in daily life of the world, won't normal person have want both hands to lift high when? This moment wants to be able to change at will personally. Wow, you miss appearance have much awkwardness.